How We Manufacture Our Jewellery In-House

New Zealand's Only Full-Scope Jewellery Manufacturer

TJ Diamond operates full-scale jewellery manufacturing facilities in Auckland, New Zealand and Houston, Texas. We are not a retailer. We are not a reseller. We are a vertically integrated factory — operating our own CAD design department, 3D printing facility, casting house, stone setting workshop and finishing workshop under one roof.

When you buy from TJ Diamond, you buy directly from the manufacturer. No importers. No wholesalers. No retail markup.

At TJ Diamond, we don't simply sell jewellery — we manufacture it.

By managing every stage of the manufacturing process, we can offer greater customisation, better quality control, and exceptional value for our clients.

Whether you're creating an engagement ring, wedding band, pendant, earrings, bracelet, or a completely custom piece, here's how the process works.

1. Consultation & Design

Every piece starts with an idea.

We discuss your design, budget, preferred metal, and any diamonds or gemstones you'd like included. You can bring photos, sketches, or simply tell us what you're looking for.

2. CAD Design

Once we understand your vision, we create a detailed 3D CAD design.

This allows you to see your jewellery before manufacturing begins and make any changes if needed.

3. Model Creation

A model is produced from the approved design to ensure all proportions and details are correct before production.

Our Factory Capabilities

🏭 Auckland — Full-Scope Manufacturing Facility

• Industrial 3D printing department
• Dedicated casting house with induction casting machinery
• Stone setting workshop
• Finishing & polishing workshop
• CAD design department

🏭 Houston — Full Casting House & Finishing Workshop

• Complete casting house — gold and platinum
• Full finishing and polishing workshop
• On-site design consultations

4. Manufacturing

Your jewellery is then manufactured using premium materials such as:

• Platinum
• 18K White Gold
• 18K Yellow Gold
• 18K Rose Gold

5. Diamond & Gemstone Selection

We carefully select diamonds and gemstones that suit your design and budget.

We work with:

• Lab-Grown Diamonds
• Natural Diamonds
• Coloured Gemstones

6. Stone Setting

Our jewellers carefully set each stone to ensure security, durability, and maximum brilliance.

7. Polishing & Finishing

Every piece is polished and finished to achieve its final appearance before inspection.

8. Quality Control

Before delivery, every piece undergoes a final quality inspection to ensure it meets our standards.

Custom Jewellery We Manufacture

We regularly create:

• Engagement Rings
• Wedding Bands
• Diamond Earrings
• Pendants
• Tennis Bracelets
• Signet Rings
• Anniversary Jewellery
• Bespoke Custom Jewellery

Ready To Create Something Unique?

Contact TJ Diamond to discuss your custom jewellery project and discover how our manufacturing process can bring your ideas to life.

Book A Free Consultation Now