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In a world where many retailers simply resell mass-produced items, TJ Gold & Diamond stands as a powerhouse of true creation. As one of the largest vertically integrated jewellery manufacturing companies, we don't just sell jewellery—we build it. From our state-of-the-art facilities to your doorstep, here is a behind-the-scenes look at how we master the art of manufacturing from A to Z, and why choosing a direct-to-consumer manufacturer is the smartest move for your next masterpiece. https://www.tjdiamond.co/en-nz/pages/manufacturing-process 1. Concept and 3D CAD Design Everything begins with a vision. Whether it’s a rough sketch or a detailed dream, our expert designers use high-end Computer-Aided Design (CAD) software to create a digital blueprint. This allows us to perfect the proportions and show you a photorealistic preview of your piece before a single grain of gold is melted. 2. High-Precision Resin Printing Once the digital model is perfected, we move into the physical world. Using advanced 3D resin printers, we create a high-resolution wax-like model. This ensures that the intricate details—the fine filigree and the precise stone seats—are captured with a level of accuracy that hand-carving simply cannot match. 3. The Casting House: From Wax to Gold This is where the magic happens. We operate our own casting house, allowing us to control the purity and quality of our alloys. Using the "lost wax" casting method, the resin model is encased in a flask, burned out, and replaced with molten 14k, 18k, or platinum. By refining our own metal, we guarantee the integrity of every gram. 4. Our Specialized Chain Factory One of the capabilities that truly sets TJ Gold & Diamond apart is our dedicated chain manufacturing factory. While most jewellers buy their chains from a third party, we manufacture our own. From classic links to complex designs, having this in-house ensures a level of durability and finish that is second to none. 5. Master Setting and Hand-Finishing Once the raw casting is complete, it moves to our master jewellers. Our stone setters use microscopic precision to secure each diamond and gemstone. Following the setting, the piece goes through a multi-stage polishing and finishing process. We don't stop until the metal has a mirror-like luster that reflects our high standards. 6. The Chemical Edge: In-House Rhodium & Refining Our expertise extends even to the chemistry of the trade. We manage our own refining and chemical production, including our own rhodium plating solutions. This vertical integration means we know exactly what goes into every layer of your jewellery, ensuring a brilliant, long-lasting white-gold finish that doesn't fade prematurely. 7. Strict Quality Control (QC) & Dispatch Before any piece leaves our facility for New Zealand, Houston, or beyond, it undergoes a rigorous multi-point QC check. We inspect the stone security, the prong integrity, and the overall finish. Only when it is perfect is it dispatched to our retail showroom or shipped directly to you. Why You’re Making the Right Choice When you choose TJ Gold & Diamond, you are cutting out the middleman. You aren't paying for a "brand markup"—you are paying for expertise, raw materials, and craftsmanship. Direct to Consumer: By manufacturing everything in-house, we pass the savings directly to you. Global Reach, Local Touch: With operations in NZ and Houston, we combine global manufacturing power with personalized service. Unmatched Capability: From CAD design to chemical refining, there is no part of the process we don't master. Ready to start your journey? Experience the confidence that comes with buying directly from the source. At TJ Gold & Diamond, if you can dream it, we can manufacture it. https://www.tjdiamond.co/en-nz/pages/manufacturing-process

Quick guide: Want the focus on the diamond? Solitaire. Want maximum visual impact per dollar? Halo. Want the most durable and practical setting? Bezel. Want extra diamond presence without a halo? Three-stone. Want a sparkling band? Pavé. Want architectural drama? Split-shank or cathedral. The setting of an engagement ring determines how the diamond sits on the band, how it is secured, and how much of the diamond is visible. It is the second most important decision after the diamond itself, and it affects both the visual character and the practical durability of the ring. This guide covers every major setting style with the specific advantages and the buyer profile each setting suits best. Solitaire Settings Browse solitaire engagement rings. A single diamond, a plain band, no additional accent stones. The solitaire is the most classic engagement ring configuration and the one that puts every aspect of the centre diamond's quality and character on full display. The four-prong solitaire is the most common and creates a rounder visual profile around the stone. The six-prong solitaire provides more security and creates a crown-like profile that suits round and oval centres particularly well. Best for: Buyers who want the centre diamond to be the complete focus of the ring. Buyers who want maximum compatibility with any wedding band. Buyers prioritising a larger centre stone within their budget. Consider if: You want a minimal, timeless aesthetic without decorative elements on the band or around the stone. Halo Settings Browse halo engagement rings. A ring of smaller accent diamonds surrounds the centre stone, amplifying the perceived size by approximately 0.25 to 0.50 carats. A 0.80 carat centre in a halo reads comparably to a 1.25 to 1.30 carat solitaire. The hidden halo (accent diamonds set slightly below the centre stone) reads as a solitaire from above with additional depth and sparkle visible at close range. Best for: Buyers who want maximum visual impression within their budget. Cushion, oval, pear, and heart shaped centres, where the halo follows the distinctive outline of the shape. Consider if: You want more overall sparkle and diamond presence than a solitaire, or if your centre stone budget is modest and you want to maximise face-up appearance. Bezel Settings Browse bezel engagement rings. A rim of metal encircles the entire perimeter of the diamond, holding it flush within the band. The bezel is the most secure setting, as the metal rim protects the stone's edge all the way around. No prongs to catch on clothing or fabrics. Particularly suited to active lifestyles and buyers who use their hands in physical work. Best for: Active lifestyles where prongs would be a practical inconvenience. Buyers who prefer a sleek, modern, architectural aesthetic. Round, oval, and emerald centres where the clean outline reads clearly within the metal frame. Consider if: Security and low-maintenance wearability are higher priorities than maximum light exposure to the stone. Pavé Settings Small accent diamonds set closely together along the band with minimal metal between them, creating a continuously sparkling surface. Pavé adds sparkle and visual weight to the ring without competing with the centre stone. Full pavé runs diamonds on all sides of the band. Half-pavé runs diamonds on the visible top half only. Micro-pavé uses smaller stones for a finer, more delicate texture. Best for: Buyers who want more overall sparkle than a plain solitaire without adding a halo. Buyers who want the band to contribute visually to the ring rather than recede. Consider if: You want a plain band to pair cleanly with the wedding band — pavé bands can limit compatible wedding band styles. Three-Stone Settings Browse three-stone engagement rings. A centre diamond flanked by two matching or complementary side stones, traditionally representing the past, present, and future. Side stones can match the centre shape (oval centre with oval sides) or contrast it (oval centre with pear sides pointing inward, emerald centre with baguette sides). Three-stone settings add more diamond presence than a solitaire without adding a halo. Best for: Buyers who want more diamond presence without a halo. Buyers who want a design with symbolic meaning built into the structure. Oval, cushion, and emerald centres pair particularly well with contrasting side stone shapes. Consider if: You want a design that feels more distinctive and custom than a standard solitaire or halo. Split-Shank and Cathedral Settings A split-shank setting divides the band into two separate strands as it approaches the centre stone, adding architectural drama. A cathedral setting arches the metal sides upward, raising the centre stone above the plane of the band for maximum visibility and a dramatic side profile. Both add complexity and visual interest to the setting without adding accent diamonds. Best for: Buyers who want architectural drama and a distinctive band profile. Round, oval, and cushion centres, where the raised or split frame creates a strong visual contrast. Consider if: You have an active lifestyle — raised or complex band profiles can catch on surfaces more than a low-profile bezel or plain solitaire. Choosing Between a Solitaire and a Halo — The Practical Decision This is the most common setting decision buyers face. The practical framework: Choose a solitaire if your priority is a larger, higher-quality centre stone and you want all visual attention on the diamond's own character. Choose a halo if your priority is maximum visual impression at a given total budget, and you are comfortable with a ring that is more decorative in character. Choose a hidden halo if you want the maximum visual impact of a halo with the clean top profile of a solitaire — the hidden halo reads as a solitaire from above and as a halo from the side. There is no objectively correct setting. The solitaire and the halo represent two different philosophies about what an engagement ring should be. Both are equally appropriate. The decision is entirely personal. Browse our full engagement ring collection to see all setting styles across all diamond shapes and metals. Or  contact us to discuss which setting style suits your specific diamond shape, budget, and lifestyle. Frequently Asked Questions Q1: What is a solitaire engagement ring setting? A solitaire setting features a single centre diamond on a plain or simply detailed band, with no additional accent diamonds on the setting or band itself. The solitaire is the most classic and most widely recognised engagement ring configuration. Its defining advantage is simplicity: all visual attention goes to the centre diamond, whose quality, size, and character are fully visible from every angle. A solitaire setting suits any diamond shape and any metal. The most common solitaire variations are the four-prong (which creates a more circular diamond outline) and the six-prong (which creates more security and a crown-like profile). Solitaires are also the easiest setting to resize and the most compatible with any wedding band style, whether plain, pavé, or contoured. Q2: What is a halo engagement ring setting? A halo setting surrounds the centre diamond with a ring of smaller accent diamonds, amplifying the perceived size of the centre stone by approximately 0.25 to 0.50 carats and adding sparkle density to the overall ring. A 0.80 carat centre diamond in a halo typically reads comparably to a 1.25 carat solitaire. The halo is the most popular setting style for oval and cushion cut centres in the current market. A standard halo sits at the same plane as the centre stone; a hidden halo (also called a floating halo) is set slightly below the centre stone, creating the appearance of a solitaire from above with additional sparkle visible from the side and at close range. Halo settings pair particularly well with oval, cushion, pear, and heart shaped centres, where the halo follows the distinctive outline of the shape. Q3: What is a bezel engagement ring setting? A bezel setting encircles the entire perimeter of the centre diamond with a rim of metal, holding the stone flush within the band. The bezel is the most secure of all common settings, as the metal rim fully protects the diamond's edge all the way around. It is the most practical setting for active lifestyles, as there are no prongs to catch on clothing or fabrics. The bezel produces a sleek, modern, clean profile that suits contemporary and minimalist aesthetics particularly well. It also suits round, oval, and emerald cut centres most naturally, where the clean outline of the shape reads clearly within the metal frame. The bezel's protective quality makes it particularly recommended for softer precious stones and for buyers who use their hands frequently in physical work. Q4: What is a pavé engagement ring setting? A pavé setting (from the French word for paved) features small accent diamonds set closely together along the band with minimal metal between them, creating a continuous, sparkling surface that appears paved with diamonds. The diamonds are held by tiny metal beads or prongs, producing the characteristic glittering band that is one of the most popular engagement ring band styles. Pavé bands add sparkle and visual weight to the ring without adding a halo or competing with the centre stone. A full pavé band runs diamonds on all sides of the band. A half-pavé runs diamonds only on the visible top half. A micro-pavé uses smaller diamonds for a finer, more delicate texture. Pavé settings require careful maintenance as the small prongs holding each stone can wear over time with daily use. Q5: What is a three-stone engagement ring setting? A three-stone setting features a centre diamond flanked by two matching or complementary side stones. The three stones traditionally represent the past, present, and future of a relationship. The side stones may be smaller versions of the same shape as the centre (round centre with round sides, oval centre with oval sides), or contrasting shapes that complement the centre outline (oval centre with pear sides pointing inward, emerald centre with baguette sides). Three-stone settings are particularly popular for oval, cushion, and emerald centres. They add more diamond presence than a solitaire without adding a halo. Three-stone rings with contrasting side stone shapes tend to read as more distinctive and custom in character than matching sets. Q6: What is a split-shank or cathedral engagement ring setting? A split-shank setting features a band that divides into two separate strands as it approaches the centre stone, creating a dramatic frame for the diamond and adding visual interest to the band's profile. The split shank creates a sense of openness and architectural detail that a plain band does not. A cathedral setting raises the centre diamond above the plane of the band by arching the metal sides upward to hold the stone at a higher position, increasing the diamond's visibility and the dramatic effect of the ring's profile from the side. Both split-shank and cathedral settings suit round, oval, and cushion centres particularly well. They are generally not recommended for buyers with active lifestyles where the raised or complex band profile might catch on surfaces. Q7: Should I choose a solitaire or a halo engagement ring? Choose a solitaire if you want the focus entirely on the centre diamond's quality and character, prefer a cleaner and more minimal profile, want maximum compatibility with any wedding band style, or are prioritising a larger centre stone within your budget. Choose a halo if you want to maximise the visual impression of the centre stone at a given budget (the halo adds approximately 0.25 to 0.50 carats of perceived size), prefer a more dramatic and decorative ring profile, or are choosing a cushion, oval, pear, or heart shaped centre where the halo follows the distinctive shape outline. The halo also suits buyers who prefer more diamond presence overall. Both settings are equally appropriate for any occasion or lifestyle. The most practical deciding factor is whether you want maximum budget in the centre stone (solitaire) or maximum overall visual impression (halo). Q8: What is the most popular engagement ring setting in NZ? The solitaire remains the most popular engagement ring setting in New Zealand overall, accounting for the majority of engagement ring sales by style. The oval solitaire in 18ct yellow gold is currently TJ Diamond's most-requested configuration in New Zealand and the broader international market. Halo settings are the second most popular, particularly for cushion and oval centres. The hidden halo has seen strong growth in the NZ market since 2022. Bezel settings have grown steadily as buyers seek more minimalist aesthetics and practical durability. Three-stone settings remain popular for milestone occasions and for buyers who want more diamond presence without a halo. Pavé bands are the most popular band style addition to solitaire settings across all shapes and metals.  

When you research engagement rings, you will encounter two gold standards: 14ct (or 14k in US notation) and 18ct (or 18k). The number describes the purity of the gold as a fraction of 24 parts. Understanding what the difference actually means for a ring worn every day for a lifetime is worth spending five minutes on before you buy. What the Numbers Mean Gold type Pure gold content Alloy content Hallmark stamp 10ct gold 41.7% 58.3% alloy metals 417 14ct gold 58.3% 41.7% alloy metals 585 18ct gold 75% 25% alloy metals 750 22ct gold 91.6% 8.4% alloy metals 916 24ct gold 99.9% 0.1% trace only 999 The 750 stamp inside an 18ct gold ring means 750 parts per thousand (75%) pure gold. The 585 stamp inside a 14ct ring means 585 parts per thousand (58.5%) pure gold. Both are real gold. The question is how much. Colour — The Most Visible Difference The most immediately apparent difference between 14ct and 18ct gold is the colour depth of yellow and rose gold. 18ct yellow gold: Richer, deeper, more saturated yellow. The higher gold content produces the warm, vivid colour associated with high-quality fine jewellery. Develops a warm patina over decades of daily wear. 14ct yellow gold: Slightly paler, less saturated yellow. The higher alloy content dilutes the gold's natural colour. In direct comparison with 18ct, the difference is visible to most observers. 18ct rose gold: Warm blush warmth from the copper alloy, richer and more vivid than 14ct rose gold. No replating required. White gold (either carat): Both are typically rhodium-plated to achieve a white surface. The colour difference between 14ct and 18ct white gold is less visible in the plated state. Durability — The Counterintuitive Truth 14ct gold is technically harder than 18ct gold because the higher alloy content introduces harder metals into the structure. In practical terms, this means 14ct gold is slightly more scratch-resistant. However, this hardness advantage is often overstated. 18ct gold is more than durable enough for daily engagement ring wear and has been used as the standard for fine jewellery in most of the world for over a century. The hardness difference is meaningful in jewellery that will experience significant friction or mechanical stress, but a well-made engagement ring in 18ct gold worn in normal daily life will not show meaningful wear difference compared to 14ct over a realistic ownership period. 18ct gold is not softer in the sense that it needs to be treated differently. It is softer in the laboratory sense, meaning it yields at a higher applied force than 14ct. In daily wear, this distinction is not meaningful for most engagement ring owners. The Replating Question Yellow 18ct gold and rose 18ct gold never need replating. The metal surface is the actual gold alloy of the ring, not a coating. White 18ct gold is typically rhodium-plated to achieve a bright white surface. This plating wears with daily contact, typically requiring professional replating every 1-3 years. This maintenance requirement applies to white gold regardless of whether it is 14ct or 18ct. For a ring worn every day for decades, TJ Diamond recommends yellow gold, rose gold, or platinum over white gold, as these metals require no ongoing replating maintenance. Why Most US Retailers Use 14ct Gold The dominance of 14ct gold in the United States is a historical commercial standard. 14ct gold costs less per piece to produce (less pure gold), which allowed retailers to maintain higher profit margins while appearing price-competitive. In most other fine jewellery markets — New Zealand, the UK, Europe, and Australia — 18ct is the standard minimum for fine engagement rings. TJ Diamond uses 18ct gold as standard at every price point. For US buyers, this means the ring ships in the international quality standard at pricing that compares favourably with US 14ct retail prices, because TJ Diamond eliminates the retail markup layers between the Auckland workshop and the buyer. Browse our yellow gold engagement rings and  rose gold engagement rings — all in 18ct gold as standard. For buyers considering white metal, see our  engagement ring collection for the full range of metal options, or  contact us to discuss metal choices for your specific ring. Frequently Asked Questions   Q1: What is the difference between 14ct and 18ct gold? 14ct gold contains 58.3% pure gold, with the remainder made up of alloy metals such as copper, silver, zinc, or nickel. 18ct gold contains 75% pure gold with a smaller alloy proportion. The higher gold content in 18ct produces a richer, deeper colour in yellow and rose gold, and a more consistent white in white gold. 18ct gold is also less likely to cause skin reactions for buyers with metal sensitivities, as the lower alloy content means less exposure to nickel and other reactive metals. In terms of durability, 14ct gold is slightly harder due to its higher alloy content, but 18ct gold is more than sufficiently durable for daily engagement ring wear, and TJ Diamond has used 18ct gold as the standard for all engagement rings and wedding bands for this reason. Q2: Which is better for an engagement ring, 14ct or 18ct gold? 18ct gold is the better choice for an engagement ring for three reasons. First, richer colour: the higher gold content produces a deeper, more vivid yellow in yellow gold, and a warmer, more lustrous rose in rose gold. Second, better long-term appearance: 18ct gold develops a warm patina over decades of daily wear that enriches its character. 14ct gold develops a slightly more yellowish tint over time as the alloy composition ages. Third, metal standards: 18ct is the international standard for fine engagement rings in New Zealand, the United Kingdom, Europe, and Australia. Most Houston and US retailers default to 14ct at the same price point. TJ Diamond uses 18ct as standard at every price point. The extra gold content is included in TJ Diamond's price at no additional charge because it is the correct base material for a ring intended to be worn for a lifetime. Q3: Is 14ct gold real gold? Yes. 14ct gold is real gold. The carat number describes the gold purity as a fraction of 24 parts. 14ct gold is 14 parts gold and 10 parts alloy metals, making it 58.3% pure gold. 18ct gold is 18 parts gold and 6 parts alloy, making it 75% pure gold. 24ct gold is 99.9% pure gold. All three are real gold. The difference is the purity level and the proportion of alloy metals present, which affects colour, durability, and price. 14ct and 18ct are both common jewellery golds. 10ct gold (41.7% pure) is also produced, primarily in the United States, though it is at the lower end of what most international standards classify as fine jewellery. Q4: Does 18ct gold tarnish or need replating? Yellow 18ct gold and rose 18ct gold do not tarnish and never need replating. The gold surface is the actual metal of the ring, not a coating applied over a base metal. What appears as tarnishing on untreated gold is the natural development of a patina as the alloy metals in the surface slowly oxidise, which typically enriches rather than diminishes the appearance of yellow gold over decades. White 18ct gold is typically rhodium-plated to achieve a bright white surface. The rhodium plating is a coating that wears over time with daily wear, typically requiring professional replating every 1-3 years. For a ring worn every day for a lifetime, TJ Diamond recommends yellow gold, rose gold, or platinum over white gold, as these metals require no ongoing replating maintenance. Q5: Why do US jewellers use 14ct gold instead of 18ct? The dominance of 14ct gold in the United States is primarily a historical commercial standard that became entrenched in the 20th century. 14ct gold is harder and more scratch-resistant than 18ct gold due to its higher alloy content, which was historically cited as a practical advantage. It also costs less per piece to produce, which allowed retailers to maintain higher profit margins while appearing price-competitive. In most other fine jewellery markets globally, including New Zealand, the United Kingdom, Europe, and Australia, 18ct gold is the standard minimum for engagement rings. TJ Diamond ships 18ct gold rings to US buyers at prices that compare favourably with US 14ct gold retail prices, because TJ Diamond is a manufacturing-direct business without retail markup layers. Q6: What does 750 stamped inside a gold ring mean? 750 is the millesimal fineness stamp for 18ct gold, indicating that the alloy contains 750 parts per thousand (75%) of pure gold. It is the international hallmarking standard used in most countries outside the United States. Inside a gold ring you may also see 585 (14ct gold, 58.5% pure), 375 (9ct gold, 37.5% pure), or 916 (22ct gold, 91.6% pure). In the United States, the ct or k (karat) marking system is more common, so an 18ct ring stamped for the US market may show 18k or 18ct. All hallmarks refer to the same purity standards. A TJ Diamond 18ct gold ring will be stamped with the appropriate hallmark for its jurisdiction. Q7: Is 18ct gold more expensive than 14ct gold? Yes, 18ct gold contains more pure gold per gram than 14ct gold, so the raw material cost is higher. At equivalent ring weight, an 18ct gold ring costs approximately 20-30% more in raw gold content than the equivalent 14ct ring. However, the total price of a ring depends on many factors beyond the metal cost, including the diamond, the craftsmanship, and the retail model of the seller. TJ Diamond's manufacturing-direct model eliminates the retail markup layers that most US jewellers apply, meaning TJ Diamond's 18ct gold rings are often priced comparably to or below what US retailers charge for equivalent 14ct gold rings at retail. The higher quality metal is included at no additional retail premium. Q8: Can you tell the difference between 14ct and 18ct gold by looking at it? In many cases, yes. 18ct yellow gold has a richer, deeper, more saturated yellow colour than 14ct yellow gold. The difference is more apparent in yellow and rose gold than in white gold, where both are typically rhodium-plated to the same white surface. In isolation, most buyers cannot precisely identify whether an unmarked ring is 14ct or 18ct. In direct side-by-side comparison, the difference in yellow gold depth is usually visible to the unaided eye, with 18ct appearing noticeably more vivid and rich. Over decades of daily wear, the colour difference becomes more apparent as the rings develop their respective patinas.