Fine Jewellery Manufacturer in Thailand

Invisible Set, Pie-Cut Diamond & Custom Jewellery Specialists

Trinity Designer Jewel is a fine jewellery manufacturer based in Bangkok's Bang Rak district, with over 20 years of experience crafting precision diamond and gemstone jewellery for clients across Europe, the USA, Asia, and the Middle East.
We work in 9k, 14k, and 18k gold with natural diamonds, offering fully custom design, small batch production, and no minimum order requirement.

What We Make

Our workshop specialises in techniques that demand the highest level of skill — invisible set diamond jewellery, where stones sit flush with no visible metal between them, and pie-cut diamond designs, where precision-cut diamond segments create the illusion of a single large stone. We also produce custom engagement rings, gemstone jewellery, tennis bracelets, pendants, and earrings, all made to order in our Bangkok atelier.
  • Invisible Set Diamond Jewellery
  • Pie-Cut Diamond Rings & Jewellery
  • Custom Engagement & Bridal Rings
  • Natural & Lab-Grown Diamond Sourcing
  • Coloured Gemstone Jewellery
  • CAD Design & 3D Prototype Development
  • Small Batch & Large Scale Production
  • 9k, 14k & 18k Gold Manufacturing
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Why Clients Choose Trinity Designer Jewel

With over two decades of manufacturing experience in Bangkok, we work directly with private clients, jewellery retailers, and international brands who need consistent quality, transparent pricing, and reliable production.
Every piece is handcrafted by our team — no shortcuts.
We offer GIA and IGI certified diamonds on request, ethical gemstone sourcing, and secure international shipping to all major markets.

Visit Us for a Consultation in Bangkok

Our workshop and design studio are located at KBS Building, Soi Mahesak 3, Bang Rak, Bangkok — in the heart of Bangkok's jewellery district. Whether you are a private client, international buyer, or wholesale partner, we offer dedicated one-on-one consultations with our design team. Book your visit via WhatsApp or email us

Frequently Asked Questions

Q: Do you have a minimum order quantity (MOQ)?
No. We work with single custom pieces for private clients as well as large production runs for retailers and brands. There is no minimum order requirement.

Q: What are your production timelines?
Standard production typically takes 3 to 4 weeks from design approval. Complex pieces involving invisible setting or custom gemstone work may take 4 to 6 weeks. Rush orders can be discussed on a case by case basis.

Q: Do you offer CAD design and prototype development?
Yes. We provide full CAD design and 3D prototype development in house. Clients can share reference images or concepts and our design team will develop technical drawings for approval before production begins.

Q: Can you manufacture to our own designs or brand specifications?
Yes. We offer OEM and private label manufacturing for jewellery retailers, designers, and brands worldwide. All designs remain confidential and we are happy to sign NDAs prior to sharing samples or specifications.

Q: Do you handle gemstone sourcing?
Yes. We source natural diamonds, lab-grown diamonds, and coloured gemstones including sapphires, rubies, and emeralds through trusted suppliers. GIA and IGI certified stones are available on request.

Q: What materials and gold karats do you work with?
We manufacture in 9k, 14k, and 18k gold using natural earth-mined diamonds, lab-grown diamonds, and a wide range of coloured gemstones. All gold is hallmarked and materials can be specified per client requirements.

Q: Do you ship internationally?
Yes. We ship worldwide to all major markets including Europe, the USA, Australia, and the Middle East. All shipments are securely packaged and fully insured during transit.

Q: Can I visit your office in Bangkok?
Yes. We welcome private clients, wholesale buyers, and trade visitors by appointment at KBS Building, Soi Mahesak 3, Bang Rak, Bangkok. Contact us via WhatsApp to arrange a visit.