Finding diamond suppliers that will actually sell to a new brand should not take months of cold calls and unreturned emails. Most founders get quoted stone minimums they cannot afford, or learn too late that a dealer only serves established accounts. This guide names five real US sources and shows you how to approach each one.
The best diamond suppliers for a new brand publish their grading, explain where stones come from, and answer terms questions before you ask. Location matters less than clear answers on certification, returns, and account requirements.
In July 2018, the FTC revised its Jewelry Guides and removed the word “natural” from the definition of a diamond. Under those Guides, lab-grown stones need a clear disclosure when you call them diamonds. That rule shapes every stone you buy and every product page you write.
If you already know what you need, Start Your Free Project, and verified US jewelry manufacturers will respond directly.
What Should You Look for in Diamond Suppliers?
Strong diamond suppliers state their account requirements, grade every stone with a named lab, and label each stone as natural, recycled, or lab-grown. Get all three in writing before you send money.
- Account requirements: Many diamond suppliers sell only to registered businesses. Rapaport Trade, for example, requires a year of trade registration. Have your business documents ready. MOQ (minimum order quantity) is the smallest amount a supplier sells per order. Ask for it in writing.
- Certification: Ask which lab grades the stone, such as GIA, IGI, or GCAL. Match the report number to the stone before you pay.
- Stone type: A recycled diamond is a natural diamond, cut from mined rough, that was set in jewelry, removed, and returned to the supply chain. A lab-grown diamond is made in a laboratory and has essentially the same optical, physical, and chemical properties as a mined diamond. Your diamond suppliers must label which is which. For why factories need written sourcing policies, see our guide to jewelry factory material sourcing policies.
- Size range: Melee diamonds are small stones, typically under 0.18 carats, used as accents and in pavé settings, where many small stones sit close together. Center stones and melee often come from different diamond suppliers.
- Buying terms: Ask whether you can buy on consignment, which means the supplier lends you stones and you pay only for the ones you keep.
- Financial footing: Charles & Colvard sold moissanite and lab-grown diamonds to manufacturers and designers. The North Carolina company filed for Chapter 11 on March 2, 2026, according to JCK. A supplier that fails mid-order can cost you your launch date.
Best Diamond Suppliers in the USA
The best diamond suppliers in the USA for 2026 are Stuller, Hoover & Strong, White Pine Wholesale, Diamond Foundry, and Rapaport Trade. We listed only diamond suppliers whose location, founding date, and trade focus we could confirm through a third party, and we mark every unpublished detail. We left out consumer retailers and Charles & Colvard.
1. Stuller
- Location: Lafayette, LA
- MOQ: Not published, trade account required
- Speciality: Loose diamonds, including lab-created stones, plus mountings and findings
- Best for: Brands that want stones and settings from one account
Matt Stuller founded the company in 1970, according to JCK. Its trade directory profile describes next-day delivery of more than 200,000 items to over 40,000 jewelry professionals. Ask early whether your brand qualifies for an account.
2. Hoover & Strong
- Location: North Chesterfield, VA
- MOQ: Not published, contact for quote
- Speciality: Harmony recycled diamonds, Canadian-origin mined diamonds, and recycled-metal casting
- Best for: Brands that sell a traceable-sourcing story
The company describes itself as established in 1912 and moved to Richmond, Virginia in 1979. Its diamond brochure says thousands of certified stones are available for immediate purchase or consignment. Its Harmony metals carry SCS Global recycled-content certification.
3. White Pine Wholesale
- Location: New York, NY
- MOQ: Not published, request the melee price card
- Speciality: Recycled natural melee, lab-grown melee, and GIA-certified diamonds
- Best for: Pavé and accent stones with recycled sourcing
Benjamin Burne founded the company in 2010, per its corporate page. Its melee program defaults to G/H color (near-colorless grades), and a January 2026 sale listing describes rounds calibrated to +/- 0.05 mm with VG+ (very good or better) makes. Its site says melee orders ship FedEx priority for next-day delivery.
4. Diamond Foundry
- Location: San Francisco, CA
- MOQ: Not published, contact for quote
- Speciality: Lab-grown diamonds
- Best for: Designer brands building collections around lab-grown stones
Silicon Valley entrepreneur Martin Roscheisen founded the company in 2012, per National Jeweler. JCK reports that it has partnered with designer jewelry brands on collections set with its stones. Trade terms for new brands are not published, so ask about minimums and exclusivity before you design around its stones.
5. Rapaport Trade (Trading Network)
- Location: New York, NY
- MOQ: Varies by seller
- Speciality: More than 1.8 million natural diamond listings from many sellers, per Rapaport in May 2026
- Best for: Established brands comparing prices across sellers
RapNet became Rapaport Trade in a May 20, 2026 rebrand. It is a marketplace of sellers, not a single supplier, and it requires a year of trade registration. New brands should treat it as a second step, after a first supplier relationship.
Diamond Supplier Comparison Table
Stuller, Hoover & Strong, White Pine, Diamond Foundry, and Rapaport Trade differ most in stone type, buying terms, and who they serve.
Supplier | Location | MOQ | Stone Types | Best For |
Stuller | Lafayette, LA | Not published, account required | Natural and lab-created loose diamonds | Stones plus settings |
Hoover & Strong | North Chesterfield, VA | Contact for quote | Recycled, Canadian-origin mined, lab-grown | Traceable sourcing |
White Pine Wholesale | New York, NY | Request price card | Recycled melee, lab-grown melee, certified | Pavé and accents |
Diamond Foundry | San Francisco, CA | Contact for quote | Lab-grown | Designer collections |
Rapaport Trade | New York, NY | Varies by seller | Natural, many sellers | Price comparison |
Comparing these diamond suppliers means weeks of calls and account paperwork. Once you settle your stones, the faster path is letting the right jewelry manufacturers come to you.
Find Diamond Jewelry Manufacturers on Maker’s Row
Maker’s Row is a marketplace connecting jewelry brand owners with verified US manufacturers. The five diamond suppliers above sell stones. Maker’s Row connects you with the manufacturers who cast, set, and finish them.
Finding the right diamond jewelry manufacturer does not have to mean months of cold emails. On Maker’s Row, post your diamond jewelry project for free and verified US manufacturers bid directly. Review bids, check profiles, connect when ready.
Name your stone type, sizes, and metal so bidding manufacturers can quote accurately. Ask each one whether it sets customer-supplied stones or sources them for you. Our guide on how manufacturing jewelers work explains each production step. Factories on Maker’s Row are active and responsive, and many reply within 24 to 48 hours of a new project being posted.
On Maker’s Row, brand owners post unlimited manufacturing projects for free and receive bids from verified US factories at no upfront cost. To connect directly, subscription plans give full access. The Bureau of Labor Statistics tracks US jewelry makers under NAICS 339910, Jewelry and Silverware Manufacturing.
How Do You Choose the Right Diamond Supplier for Your Brand?
Compare diamond suppliers on five things: stone list, memo terms, delivery time, certification, and financial stability.
- Define your stone list and budget before reaching out. Know your carat range, shapes, and whether you need melee or center stones. If you also need findings and settings, read our guide to jewelry components wholesale.
- Request a memo or sample parcel before committing. A memo is a short-term loan of stones that you return or buy. Ask your diamond suppliers whether they ship a small parcel on those terms.
- Ask for delivery time separately from production time. Picture a Brooklyn designer building a pavé stacking ring. She orders recycled G/H melee from White Pine in New York, which ships melee FedEx priority for next-day delivery, then sends the stones and her CAD (computer-aided design) file to a casting shop.
- Verify certification and origin disclosure. In April 2019, the FTC sent warning letters to eight companies over ads that raised concerns about how they described lab-created and simulated diamonds. Require origin on every invoice.
- Start with a small test order before scaling. Check financial stability too, and avoid large prepayments to new diamond suppliers.
Also Read: How Jewelry Supply Shops Simplify Brand Launches →
FAQs About Diamond Suppliers in the USA
These answers cover minimums, delivery, cost, and vetting for brands buying diamonds in the USA.
No single average MOQ applies, because most trade sources sell by the stone or the parcel rather than by a set unit count. Stuller, Hoover & Strong, and Diamond Foundry do not publish minimums, so request terms in writing from any diamond suppliers you shortlist. Ask whether the minimum is per stone, per parcel, or per invoice.
Stock stones can arrive the next business day, while special orders take longer. Stuller’s profile and White Pine’s site both describe next-day delivery. Hoover & Strong lists certified stones for immediate purchase. Ask diamond suppliers for a written timeline on anything made to order.
Cost depends on carat weight, color, clarity, cut, and origin, so no honest single figure exists. The Rapaport Price List is the trade’s benchmark for natural diamond pricing. JCK reports that lab-grown wholesale prices have been in decline, so quote lab-grown stones fresh each time. Request itemized quotes from at least two diamond suppliers.
Natural diamonds are mined, recycled diamonds are previously used natural stones, and lab-grown diamonds are made in a laboratory. Hoover & Strong describes recycled stones as natural diamonds returned to supply after earlier use. Lab-grown stones have essentially the same optical, physical, and chemical properties as mined ones, per the FTC, but must be disclosed.
Yes, several diamond suppliers serve independent designers and small jewelers. White Pine sells to retailers, wholesalers, and jewelry designers or brands, and Stuller told JCK its model caters to independent retailers. Expect to document your business first.
Verify diamond suppliers by confirming a physical address, a founding history, and certifications you can check yourself. Match each grading report number against the issuing lab’s own report check. Ask for trade references before your first order.
Yes, you can launch by buying a small parcel from one of the diamond suppliers above and working with a manufacturer who guides the build. White Pine’s melee price card lets you price accent stones before you commit. Post your project on Maker’s Row so bidding manufacturers can quote the setting.
Ready to Find Your Diamond Jewelry Manufacturer?
Your diamond jewelry brand is one manufacturer away from becoming real. The factories are on Maker’s Row, ready to bid.
