Union Gems

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Fine-make diamond specialists Union Gems is a fine-make diamond specialist, catering to the needs of discerning jewelers across North America.

We're family-owned and operated, and we take pride in our friendly service and quality products. We specialize in fine-make GIA round and fancies (including cushions, ovals, and emeralds). We are a premier supplier of GIA 3EX and Hearts & Arrows, and we sell more than paper. We, personally, “cherry-pick” each and every stone.

11/05/2026

Our Signature Collection is built around diamonds that make you say “WOW!” 💎

This 4.02ct E-SI1 French Culet Oval is majestic, beautifully proportioned, and cut with intention.

Notice the generous face-up size — and the absence of a bow-tie.

Set in platinum.

Jewelers: DM **“LOOKBOOK”** and we’ll send you the full collection, including GIA reports and videos.

11/04/2026

Did you know many Union Gems diamonds come with both a GIA report and an AGS Ideal® Light Performance Report?

🎥 Featured: our stunning 7.90ct J-SI1 GIA 3X round with AGS Ideal® Light Performance — part of the Union Gems Signature Collection.

Beautiful on paper. Breathtaking in person.

Want to see more of our ideal-cut rounds? DM “IDEAL”.

11/03/2026

A beautiful diamond we all can agree on.

This 7.02ct K-VS1 emerald cut was hand-selected for it's white faceup and impeccable make. Set in platinum with two J-VVS2 trapezoids (2.02ctw).

From our Signature Collection lookbook. Jewelers: DM "LOOKBOOK" and we’ll send you the full collection, with GIA reports and videos.

11/01/2026

4.04ct J-SI1 radiant, selected for its elegant outline, strong light performance, and bright white face.

Set in platinum with two I-J VVS trapezoids, 1.11ctw.

From our Signature Collection lookbook.

Jewelers: DM **“LOOKBOOK”** and we’ll send you the full collection, including GIA reports and videos.

10/29/2026

Beautiful, inside and out.

This stunning 3.31 Fancy Yellow, Internally Flawless radiant comes from the GemFair program, which supports artisanal mining communities in Sierra Leone. The diamond is set in platinum and 18 karat yellow gold, with two FG/VVS1 GIA brilliant-cut trapezoids (1.00 carat total).

From the Signature Collection. Jewelers: DM us "LOOKBOOK" for the full lookbook.

10/27/2026

9 carats of 3X cutting.

This solitaire keeps all the attention on the 9.03 carat, J-color, SI2-clarity round.

From the Signature Collection. Jewelers: DM us "LOOKBOOK" for the full lookbook.

10/26/2026

Bespoke Pieces. Designed for Your Best Clients.

With the holidays ahead, we've built rings, diamond studs and tennis jewelry to showcase our curated diamond inventory. Each piece is manufactured with care, every ring center is GIA graded, and everything is in stock.

Jewelers: DM us "LOOKBOOK" and we'll send you the full Signature Collection.

09/30/2026

Jewelers can buy a diamond from anyone. When it's for their own milestone, they choose the one source they trust completely.

This one chose us.

"I'm honored that my stone came from someone I like and trust."

When it's personal, jewelers call Union Gems. When it's for your clients, you can too.

09/28/2026

Lab-grown diamond prices have dropped dramatically, and there’s a silent trap many stores aren’t seeing.

Even with higher markups, retailers are generating fewer gross profit dollars per sale, while payroll, rent, insurance, and other expenses keep rising.

At AGS Conclave, we discussed a 9-step plan to help the stores we work with grow diamond profitability.

If you’re navigating this shift, DM us.

09/23/2026

Behind the Buy | Day 3 💎

A few diamonds stopped us in our tracks today. After looking through thousands of stones, these are the moments that keep buying trips fun.

A few highlights from the search. 👀

Which one would you put in your case?

Address

6222 Richmond Avenue Ste 865
Houston, TX
77057

Telephone

+17139770300

Website

http://www.uniongem.com/

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