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.

09/09/2026

You make a promise to your client. We make sure you can keep it.

08/19/2026

Not sure how to bring your client’s custom idea to life?

Even for the most complicated pieces (and we’ve seen quite a few), we can have the CAD ready within 24–48 hours.

We send the interactive 3D model to you, and you can share it with your client. They can open it right on their phone, view it from every angle, and no app is required.

Need changes? We offer unlimited edits until you and your client are happy with the design.

08/06/2026

6-day rush custom manufacturing for only an additional $50? Yes!

Because we know your customers aren't just waiting for jewelry, they're waiting for proposals, anniversaries, birthdays, and once-in-a-lifetime moments that cannot be delayed.

When your client needs it by next week, we're here to help make it happen.

⚡Standard manufacturing: 8–12 business days
⚡Rush option: 6 days

Happy to help bring your clients’ ideas to life!
07/16/2026

Happy to help bring your clients’ ideas to life!

Bold, timeless, and uniquely yours. ✨
This custom-made ruby and diamond engagement ring was handcrafted to stand out.
Created with Dia-Co Jewelry 💍

07/15/2026

Your clients see the finished piece. We take care of everything that happens before it gets there.

Dia-co partners with jewelry brands and retailers to handle the manufacturing process—from CAD to final production—so you can focus on growing your business.

When you work with Dia-co, you can expect:
• 24–48 hour CAD turnaround
• A dedicated account manager
• 7–12 business day production (rush available)
• Precision craftsmanship under a microscope

What are you creating next?

07/03/2026

From our bench to yours. Another piece finished by Dia-co for another jewelry brand.

We take care of manufacturing, you handle the rest.

When you work with Dia-co you get:

- 24-48 hr CAD turnaround
- A dedicated account manager
- 7-12 days production (rush options available)
- Highest quality - our jewelers work under microscope

DM us to start your next project!

06/30/2026

What makes a client choose one ring over another when the stone and the price are nearly identical?

Usually it's a detail. This radiant cut keeps the clean, classic top your client expects — and a floral basket gallery underneath, an Art Nouveau-era detail that's invisible from the top and almost impossible to miss from the side.

We manufacture pieces like this for retail jewelry brands and custom jewelry manufacturers.

📩 DM us to get a quote

06/12/2026

Channel setting looks clean from the outside but it's one of the more unforgiving techniques in production. Every stone has to sit perfectly or the whole thing reads off. Zero margin for error, and that's exactly what makes it satisfying to get right.

Send us a test project and see the difference firsthand.

06/08/2026

Here's another BTS of this vintage inspired cushion cut ring, and what it actually takes to get those details right.

When jewelers work with Diaco, they get:

- CAD turnaround in 24-48 hours
- Rush production options when you need them
- Internal software to track your order status in real time
- A dedicated account manager
- More time to take care of their customers

DM us to get started.

Address

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

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