Dia-Co Jewelry

Dia-Co Jewelry Dia-Co is a full-service custom jewelry manufacturing partner based in Los Angeles, providing end-to-end solutions for designers, brands, and retailers.

Founded in 1994, we specialize in transforming ideas into reality with in-house CAD design, premium casting, stone setting, and finishing — all done to the highest quality standards.

05/28/2026

Yes or no: horizontal diamond setting? 💍

The traditional vertical set elongates the finger and dominates the market for a reason. But the East-West style offers something different — wider, more modern, a little unexpected.

Does this belong in your showcase?

05/18/2026

Not every piece needs to arrive 100% complete.

Many retailers and custom jewelers we work with prefer to set their stones in-house, and we're built for that flexibility.

This ring headed to our client ready for their final touch - the center stone setting.

05/13/2026

Made for your clients by Dia-co

We made the band in this rose gold stack, and it's not your typical wedding band. Custom engraved texture, mixed metal details, and a design that stands out. Any design complexity is not a problem when you have a manufacturing partner that can make your clients' ideas come true, seamlessly.

When you can say YES to any design request, that's the foundation your business needs to scale with confidence.

05/07/2026

Good turnaround time starts long before production.

Clear CAD approval, confirmed specs, locked-in timelines - no stopping mid-process to ask questions or redo sections. We remove friction before it starts so you can focus on your clients.

DM us to see how it works for your orders

05/05/2026

When your client asks "Can we do this?" we want to make sure you know the answer.

That's why each of our clients has a dedicated account manager. They review technical feasibility upfront and make sure there's no gap between design and production. You understand what's possible before you promise anything to your customers.

DM us to start your next project.

05/01/2026

These are just a few of the many small steps we take to get each piece retail-ready for your clients. While we're prepping, perfecting, and making everything retail-ready, you get to stay focused on your clients and your art.

04/25/2026

This recent 14k gold ring was produced for one of our retail partners, from CAD refinement through final polish, with consistency and QC at every stage.

Built for brands that need manufacturing they can scale with.

04/22/2026

Guess the center stone 👀
Elongated cushion cut with curved hidden halo and graduated diamond accents in yellow gold.

DM for wholesale pricing

04/17/2026

We QC every stage, from stone setting to final polish, so your client never sees what could’ve gone wrong.
Large center stone, detailed gallery, fine milgrain - all executed in-house.

If your designs require precision, we’re built for it.

Address

550 S. Hill St #1055
Los Angeles, CA
90013

Telephone

+12136229608

Website

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