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09 August, 2026
Diamond jewelry sells at a higher ticket than almost anything else in your store, and if you deal in it, you already know one bad batch can cost you more than a whole tray of silver ever would. That is why the manufacturer you buy your diamonds from is a decision worth slowing down on.
The tricky part is that a lot of manufacturers look sharp at the sample stage, and then the bulk order comes back with stones sitting a grade below the report you were shown, and you are the one who has to explain it to a customer who paid full diamond money. So you want a manufacturer who sends you the same graded quality on the first order and the fiftieth, whether the stones are natural or lab-grown.
Here in this blog, we have listed the top 10 diamond jewelry manufacturers in the USA. You can read about each one and pick the manufacturer that fits your store.
So, let's get started.
JewelPin is a jewelry manufacturer and supplier that works with retailers, boutique owners, and wholesalers in the USA.
The company has an in-house manufacturing unit with a dedicated collection and specialization in 14K gold diamond jewelry. You can find a collection of diamond jewelry in 14K gold, with the white diamonds set as accents on the pieces, along with options in 9K, 10K, and 18K gold.
Since the jewelry is manufactured in its own unit, you can expect wholesale affordable pricing. Furthermore, you can also order custom diamond jewelry along with a ready-to-ship collection.
Stuller has been running out of Lafayette, Louisiana, for more than fifty years, and it is one of the biggest jewelry suppliers in the country. Diamond jewelry is one part of that catalog.
The diamonds come in both natural and lab-grown, and Stuller makes the finished pieces as well as the settings you can mount your own stones in. You will find both the ready jewelry and the loose mountings here, so this one suits a store that wants to buy finished or build its own around a diamond.
Overnight Mountings is a New York manufacturer that makes bridal jewelry, diamond mountings, and stud settings, all made in the USA.
Most of what the company turns out is the mounting side: the settings you drop your own diamonds into for rings and studs. You will find the bridal and engagement styles here more than finished loose-diamond pieces, so this one suits a store that sets its own stones or sells a lot of engagement jewelry.
Charles & Colvard started out in North Carolina back in 1995, and the company built its name on lab-grown stones. It was the original maker of lab-grown moissanite, and it has since moved into lab-grown diamonds as well.
The diamonds are sold through the company's own wholesale portal, where approved retailers can buy certified and non-certified loose lab-grown stones in different shapes and carat weights. You will find only the lab-grown side here, no natural diamonds, so this one suits a store that is leaning into the lab-grown market.
Quality Gold works out of Fairfield, Ohio, and it is one of the larger wholesale jewelry distributors in the country. The company sells to jewelers and retailers rather than the public, and diamond jewelry runs through its catalog.
The company keeps a very large ready stock, with hundreds of thousands of products held for same-day shipping, so the diamond pieces you order usually go out fast instead of waiting on production. For the pieces not held on the shelf, it also runs special orders.
You will find finished diamond jewelry here more than loose stones, so this one suits a busy store that reorders often and wants the counter kept filled without a long wait.
Hoover & Strong runs out of Virginia and works as a refiner and manufacturer with a focus on recycled and responsible materials. Its diamond side sits within that eco-friendly setup.
The company pairs its recycled metals with lab-grown and conflict-free diamonds, so the stones you order come with an ethical sourcing story behind them. You will find the responsible-materials angle front and center here, so this one suits a store whose customers ask where the diamonds and the gold came from.
Frederick Goldman has been making jewelry out of New York for a long time, and wedding and bridal pieces are its main line. The diamond side here is mostly wedding bands and engagement rings.
The company makes these for the trade, so you order through its wholesale side and not off a shop shelf. You will find the bridal styles run deep here, so this one suits a store that sells plenty of engagement and wedding jewelry.
Leo Schachter works out of the New York diamond district and is one of the bigger polished-diamond manufacturers around. The company cuts and polishes its own stones, and it is known for the branded Leo Diamond cut.
Because the diamonds are cut in-house, the pieces here come with the stones already graded and finished to the company's own standard. You will find the focus on the diamond itself here, so this one suits a store that wants cut, branded stones to build its jewelry around.
ASBA USA is a family-run maker based in Sarasota, Florida, and the jewelry is made at its own facility over in Bangkok. Finished diamond jewelry is one of its main lines, and the pieces come set in 18K and 14K gold.
Alongside the diamonds, the company also does colored gemstones and Tahitian pearls, so the range runs wider than diamonds alone. You will find ready-made gold diamond pieces here more than loose stones, so this one suits a store that wants to buy finished and put it straight on the counter.
Coast Diamond has been designing bridal jewelry out of Glendale, California since 1978, and engagement rings are the main line. The designs go from simple, clean settings to more detailed, worked ones.
Most of what Coast makes is the semi-mount. That is the ring on its own, made with a spot for a centre diamond that gets set in later. So you pick the setting from Coast and match it with whatever centre stone your customer is after, instead of ordering the whole ring finished.
You will find the engagement ring side covered here, so this one suits a store that sells a lot of bridal and would rather handle the centre diamond itself.
Look, every name on this list can supply you with diamond jewelry, but not all of them work the same way. A few cut their own stones. Others just build the settings, or hand you a piece that is finished and ready for the case. What fits your store really comes down to how you sell.
At JewelPin, we make the diamond jewelry in-house, with white diamonds set into 14K gold, and we take custom orders next to the ready-to-ship pieces. So if you want the quality to hold from your first order through to a big one, start with us and see how it goes.
