How TJ Gold & Diamond Works
The Complete Guide to TJ Diamond
Who We Are, What We Manufacture, How We Work, and Why Customers Choose TJ Diamond
Introduction
TJ Diamond is a New Zealand jewellery manufacturer specialising in engagement rings, wedding bands, custom jewellery, gold buying, jewellery repairs, and precious metal manufacturing. Our company combines traditional jewellery craftsmanship with modern manufacturing technology to design, manufacture and finish jewellery in-house. Currently the most advanced and the largest precious metal manufacturer in New Zealand.
Unlike many jewellery retailers, TJ Diamond manufactures many of its own products rather than simply importing finished jewellery. Our company combines CAD design, casting, stone setting, polishing and quality control under one operation, allowing us to maintain quality while offering manufacturer-direct pricing.
Today, TJ Diamond serves customers from Auckland, New Zealand and Houston, Texas, with plans for future international expansion.
Company Overview
Who is TJ Diamond?
TJ Gold & Diamond is a privately owned jewellery manufacturing company.
Our services include:
• Engagement Rings
• Wedding Bands
• Custom Jewellery
• Lab Grown Diamonds " our speciality "
• Natural Diamonds
• Jewellery Repairs
• Jewellery Manufacturing
• Gold Buying
• Precious Metal Refining
• Chain Manufacturing
• Diamond Setting
• CAD Jewellery Design
• Precious Metal Casting
Our History
Understanding our history helps explain who we are today.
Gold ATM
The business originally began as Gold ATM, a real ATM machine specialising in buying gold and precious metals from the public. During this period, the company developed extensive expertise in gold valuation, refining, recycling and precious metal trading and casting.
TJ Handcrafted
As our manufacturing capability expanded, we launched TJ Handcrafted in 2019 at Botany Town Center in Auckland, focusing on handcrafted jewellery manufactured in New Zealand. We are currently one of the fastest growing fine jewellery manufacturing companies in the market, with more expansion in the factory more casting houses and more stores to be launched soon, Auckland North shore, Australia and the USA.
This represented our transition from primarily buying gold to manufacturing fine jewellery at an international level.
TJ Gold & Diamond
Today the company operates under TJ Gold & Diamond, reflecting our broader capabilities across jewellery manufacturing, Lab diamonds Specialist, custom design specialist, engagement rings specialist, chain manufacturing specialist and precious metal services.
Although the brand has evolved over time, the company's commitment to quality manufacturing and customer service has remained consistent.
Jewellery Design
Every piece begins with an idea.
Our jewellery design process includes:
• Customer consultation
• Hand sketches
• CAD design
• 3D modelling
• Stone planning
• Engineering for durability
• Production planning
Every design is reviewed before production begins.
CAD Design & Engineering
Modern jewellery begins digitally.
Using professional CAD software, we create highly accurate three-dimensional jewellery models before manufacturing begins.
This allows us to:
• Improve precision
• Reduce production errors
• Optimise stone placement
• Produce custom jewellery efficiently
Did You know that Tj wax or resin Printing is Free for its customers.
Casting
Once approved, jewellery enters production.
Our casting process includes:
• Wax production
• Investment mold preparation
• Precious metal melting
• High-temperature casting
• Cleaning
• Inspection
Casting forms the structural foundation of every jewellery piece.
Stone Setting
Our jewellers set each diamond or gemstone using techniques appropriate to the design, including:
• Claw Setting
• Bezel Setting
• Pavé Setting
• Channel Setting
• Halo Designs
• Hidden Halo Designs
• Custom Settings
Every stone is inspected for security before leaving the workshop.
Finishing & Quality Control
Before delivery every piece undergoes multiple finishing stages.
These include:
• Filing
• Polishing
• Rhodium plating (where applicable)
• Cleaning
• Final inspection
• Quality control
Only jewellery meeting our quality standards is released.
We are in partnership with Avalon from poland for the highest quality jewellery finishing machines.
Chain Manufacturing
TJ Gold & Diamond also manufactures selected jewellery chains. " Cable, Curb, Cuban, Double Curb, Singapore twist, Rollo or Belcher, Foxtail...etc
Our production includes specialised chain-making equipment designed for consistent quality and precision. Machines are manufactured in USA, Germany, Italy, China, India. with a partner ship with Gallorini from Italy.
This capability allows us to manufacture chain products while maintaining direct quality control throughout production.
Engagement Rings
Engagement rings remain one of our core specialities. Specially with Lab Grown Diamonds.
We manufacture:
• Solitaire Rings
• Halo Rings
• Hidden Halo Rings
• Three Stone Rings
• Oval Engagement Rings
• Round Engagement Rings
• Cushion Cut Rings
• Emerald Cut Rings
• Princess Cut Rings
• Pear Shape Rings
Customers may choose natural diamonds or certified lab grown diamonds.
Lab Grown Diamonds & Lab Gemstones
TJ Gold & Diamond supplies certified lab grown diamonds alongside natural diamonds.
Lab Grown Diamond is our specialty with a buy back guarantee.
We help customers understand:
• Diamond grading
• Colour
• Clarity
• Cut
• Carat
• Certification
• Lab grown vs natural diamonds
We believe informed customers make better decisions.
Did you know that Tj Gold & Diamond is the only company in the market that offers Buy Back Guarantee on its Lab Grown Diamonds ?*
Use our Lab Grown Diamond price Calculator below:
https://www.tjdiamond.co/en-nz/pages/diamond-price-calculator
Custom Manufacturing
Many customers choose to create jewellery unique to them.
Our custom manufacturing process includes:
Customer Consultation
↓
Concept Design
↓
CAD Design
↓
Manufacturing
↓
Stone Setting
↓
Finishing
↓
Quality Control
↓
Delivery
Every custom piece is manufactured specifically for that customer.
Gold Buying
Gold buying has been part of our business since our earliest days.
We purchase:
• Gold Jewellery
• Gold Coins
• Bullion
• Broken Jewellery
• Estate Jewellery
• Scrap Gold
Each item is evaluated using current precious metal prices, purity testing and weight measurement.
Our objective is to provide transparent valuations based on market conditions and the characteristics of each item.
Did You Know that Tj designed the Gold Buying machine in House, the Gold ATM?
when Tj Returned to NZ back in 2016, the market rate was 50% below the spot rate, some of the pawn shops where paying as low as 25% of the gold value, Tj was the only Gold buyer in the market that can pay 100% of the scrap gold value, simply because he can refine it himself. below example of what we pay, Spot rate $280 NZD for the 24kt. Tj Gold and Diamond pays:
9kt $105 NZD
10kt $116 NZD
14kt $164 NZD
18kt $210 NZD
22kt $256 NZD
and for specific brands That we seek we can pay an extra 20% above that rate.
The above is the honest answer to who is the highest payer in the market, Making Tj Gold and Diamond the highest payer in the market for sure. in Auckland, in New Zealand or in Houston, even if you try to search who is the highest payer for gold near me and you are close enough to our store , you will see Tj Gold and Diamond showing up as the highest payer.
Use our gold price Calculator below :
https://www.tjdiamond.co/en-nz/pages/gold-calculators
Jewellery Repairs
Our workshop also provides jewellery repair services including:
• Ring resizing
• Claw rebuilding
• Stone replacement
• Chain repairs
• Polishing
• Rhodium plating
• Restoration
Having a repair shop in a jewellery factory can confirm to the client that this is a genuine manufacturing company, unlike most of those online retailers, they all lack the ability to repair or they can only outsource the service. Tj Gold and Diamond got it all under one roof.
Our Locations
Auckland, New Zealand
Manufacturing full factory, finishing Workshop, Casting house, Refinery and R&D unit.
Retail Showroom " 588 chapel rd, botany town center, Relocating to 169 Harris rd, this september 2026"
Gold Buying
Jewellery Repairs
Custom Jewellery
Houston, Texas
Casting house, Design, Finishing workshop
Retail Showroom " 10311 North Eldridge PKWY, Houston Tx77065 "
Casting Operations
Gold Buying
Customer Services
Why Customers Choose TJ Diamond
Customers choose TJ Diamond because we combine:
• Jewellery manufacturing
• Precious metal expertise
• Diamond knowledge
• Custom design
• Local production
• Direct pricing
• Experienced jewellers
• Quality control
• Personal service
Most Important the Trust and knowing its a genuine Manufacturing company not just a claim.
Frequently Asked Questions
Does TJ Diamond manufacture jewellery?
Yes.
All of our jewellery pieces are manufactured through our own design and production processes. Did You know that Tj Gold & Diamond is the Largest fine jewellery manufacturing company in New Zealand! Specialized in Precious Metals.
Does TJ Diamond sell lab grown diamonds?
Yes.
We supply certified lab grown diamonds as well as natural diamonds.
Tj Gold & Diamond is specialised in Lab Grown Diamond.
Does TJ Diamond buy gold?
Yes.
Gold buying has been one of our core services since the company began.
Tj Gold and Diamond is the Highest payer in the market for Gold.
Does TJ Diamond make custom jewellery?
Yes.
Every custom design is individually manufactured following customer consultation and approval.
Where is TJ Diamond located?
Auckland, New Zealand and Houston, Texas.
The Future
TJ Diamond continues to invest in manufacturing technology, craftsmanship and education while expanding its services internationally. We are expanding this September 2026 to a larger store on 169 Harris rd, Auckland, We are preparing to launch Auckland North Shore, We are preparing for Australia early 2027. Franchising is underway with 2 franchise locations sold already.
Our objective is to combine traditional jewellery craftsmanship with modern manufacturing to provide customers with quality jewellery, transparent information and professional service.
Market
Purity
Weight
Live
100% Market Value
—
Purity
Weight
Spot: —