The USA is one of the world’s major markets for natural diamonds, with important jewellery and diamond-trading hubs in New York, Los Angeles, and other major cities. From wholesale diamond houses to specialist suppliers and manufacturers, buyers have access to a wide range of natural diamonds.
For jewellers, designers, retailers, and private clients, choosing the right supplier involves more than comparing prices. Certification, provenance, diamond quality, sourcing expertise, matching capabilities, and bespoke services can all make a difference.
Here are 10 natural diamond suppliers worth considering in the USA, starting with Raremonds.
Top 10 Best Natural Diamond Suppliers in the USA
1. Raremonds
Raremonds is a specialist natural diamond supplier serving jewellers, designers, private clients, collectors, and trade professionals in the USA and worldwide. The brand focuses on natural coloured diamonds, white diamonds, rare stones, special cuts, and bespoke diamond sourcing.
Raremonds offers:
- Natural coloured and white diamonds
- Yellow, Pink, Blue, Green, Violet and Orange diamonds
- Argyle and ultra-rare diamonds
- Fancy Light to Fancy Vivid and Fancy Deep diamonds
- Precision-matched pairs and layouts
- Special and designer cuts
- Custom-cut and made-to-spec diamonds
- Bespoke diamond and jewellery services
2. New York Diamond Exchange
New York Diamond Exchange is a long-established diamond business operating in New York’s Diamond District. The company traces its roots in the diamond industry back to 1917 and focuses on providing access to certified diamonds.
Its offerings include:
- GIA-certified diamonds
- Large selection of loose diamonds
- Multiple shapes, colours and clarities
- Wholesale-market access
- Engagement and jewellery diamonds
- Nationwide service
The company states that it has more than 30,000 GIA-certified diamonds available across different specifications. (The New York Diamond Exchange)
3. OM Jewels Inc
OM Jewels Inc is a New York-based diamond wholesaler and manufacturer serving jewellers, designers, retailers, and international buyers. Located in the Diamond District, the company offers both natural and lab-grown diamonds, with a strong focus on wholesale supply.
Its natural diamond offerings include:
- GIA and IGI-certified diamonds
- Fancy-shaped diamonds
- Matching pairs
- Calibrated layouts
- Salt and pepper diamonds
- Bulk diamond supply
- Custom-cut diamonds
OM Jewels also provides manufacturer-direct sourcing and custom diamond manufacturing. (Om Jewels INC)
4. Fine Star Diamonds NY
Fine Star Diamonds NY is a New York-based wholesale diamond and jewellery company with more than 25 years of industry experience. The company works with retailers and jewellery brands requiring natural diamonds as well as custom jewellery manufacturing.
Its services include:
- GIA-certified natural diamonds
- Diamond layouts
- Diamond melee
- Custom jewellery
- CAD design services
- Made-in-USA jewellery
- Wholesale diamond supply
Fine Star positions itself as a long-term supply and manufacturing partner for jewellery retailers and brands. (Fine Star Diamonds NY)
5. KGK International
KGK International is the US operation of the established KGK Group and is based in New York’s Diamond District. The company is involved in natural diamonds, jewellery manufacturing, and global diamond supply.
KGK offers:
- Natural diamonds
- Diamond manufacturing
- Jewellery manufacturing
- Global sourcing
- B2B diamond supply
- Certified diamond options
KGK International is also listed by GIA as a participant in its Diamond Origin Service, which supports the sourcing of natural diamonds with confirmed countries of origin. (gia)
6. Sheetal Group USA
Sheetal Group USA is a New York-based diamond company located on West 47th Street in the Diamond District. The company is part of the broader Sheetal Group and serves the professional diamond and jewellery trade.
Its capabilities include:
- Natural diamonds
- Diamond manufacturing
- Wholesale supply
- International sourcing
- Jewellery industry services
- Origin documentation
Sheetal Group USA is listed among the participants in GIA’s Diamond Origin Service, which is designed to support natural diamonds with confirmed origin information. (gia)
7. Sundara Diamonds
Sundara Diamonds is a US-based diamond supplier focused on serving independent jewellery retailers. The company offers natural earth-mined diamonds across a wide range of shapes and sizes.
Its offerings include:
- 100% natural diamonds
- Loose diamonds from melee to larger stones
- Multiple shapes and sizes
- Certified diamonds
- Ethically sourced diamonds
- Flexible memo terms
- Fast delivery options
Sundara states that its diamonds are graded by recognized laboratories and that it provides services specifically for independent jewellery businesses. (Sundara Diamonds)
8. Diamond By Empire
Diamond By Empire is a New York-based B2B diamond supplier serving jewellery businesses rather than individual consumers. The company focuses on supplying certified natural and lab-grown diamonds to professional buyers.
Its natural diamond services include:
- Natural diamonds
- GIA and IGI certification
- B2B diamond supply
- Diamond sourcing
- 4Cs-based grading information
- Professional customer support
The company emphasizes transparency, certification, and long-term relationships with business customers. (Diamond by EMPIRE)
9. Mann Gems
Mann Gems supplies natural diamonds to jewellery manufacturers, wholesalers, and importers across the United States. Although its primary diamond operations are based in India, it specifically serves the US market with wholesale natural diamond supply.
Its offerings include:
- GIA and IGI-certified natural diamonds
- Round diamonds
- Fancy shapes
- Wholesale supply
- Bulk orders
- Direct-from-source sourcing
Mann Gems states that it has more than 15 years of experience in the natural and lab-grown diamond trade and supplies US buyers directly from its Indian operations. (Mann Gems)
10. D. Nitin & Co.
D. Nitin & Co. is an established diamond manufacturer and exporter supplying international jewellery manufacturers, wholesalers, and retailers. While its manufacturing base is in Surat, India, the company serves international markets including the USA.
Its offerings include:
- Certified natural diamonds
- Round diamonds
- Princess-cut diamonds
- Fancy shapes
- GIA-certified stones
- Wholesale supply
- Export services
The company states that it has more than 25 years of experience in diamond manufacturing and wholesale supply. (D.Nitin & Co.)
Why Choose Raremonds for Natural Diamonds in the USA?
For US jewellers, designers, collectors, and private clients, sourcing the right natural diamond can involve much more than browsing an online inventory. The challenge becomes greater when the requirement involves a rare coloured diamond, unusual shape, matched pair, specific millimeter dimensions, or a high-jewellery layout.
Raremonds takes a specialist approach to these requirements, combining natural diamond expertise with personalized sourcing and bespoke services.
15+ Years of Specialist Expertise
Raremonds is backed by 15+ years of expertise in natural fancy coloured diamonds, led by Parth Shah. His experience in the natural coloured diamond market and participation in major international trade shows allows clients to access specialist knowledge when sourcing unusual or high-value stones.
Natural Coloured Diamonds
Raremonds specializes in the full natural coloured diamond spectrum, including:
- Yellow diamonds
- Pink diamonds
- Blue diamonds
- Green diamonds
- Violet diamonds
- Orange diamonds
- Argyle diamonds
The collection spans different colour intensities, including Fancy Light, Fancy, Fancy Vivid, and Fancy Deep, depending on availability.
For US buyers interested in coloured diamonds, this specialist knowledge can be particularly valuable because colour intensity, tone, saturation, undertones, shape, rarity, and origin can all influence a stone’s desirability and value.
Diamond Evaluation Beyond the Certificate
A laboratory report provides essential information about a diamond, but specialist visual inspection can provide additional insight into how a stone actually performs.
Every Raremonds stone is inspected under loupe and microscope, with attention to details such as:
- Fluorescence haze
- Bow-tie effect
- Uneven colour distribution
- Saturation consistency
- Overall visual appearance
This additional evaluation helps ensure that the diamond is assessed beyond its basic grading information.
Precision-Matched Natural Diamonds
For jewellery designers, finding one beautiful diamond is only part of the process. Finding several diamonds that work together can be significantly more challenging.
Raremonds specializes in precision-matched pairs and layouts for:
- Earrings
- Bracelets
- Rings
- Multi-stone jewellery
- High-jewellery collections
The team can evaluate colour, saturation, proportions, dimensions, and overall appearance to create more consistent layouts. Where appropriate, recut-to-match capabilities can also help achieve greater symmetry and consistency.
Special-Cut and Rare Diamonds
Raremonds specializes in diamonds that may require more advanced sourcing expertise, including:
- Old Mine Cuts
- Old European Cuts
- Rose Cuts
- Half-Moons
- Trapezoids
- Baguettes
- Shields
- Hexagons
- Cadillacs
- Kites
- Epaulets
- Trilliants
- Briolettes
These cuts can be especially valuable for designers developing distinctive high-jewellery pieces where standard proportions are not enough.
Traceability and Provenance
For US buyers, provenance and responsible sourcing can be important considerations, particularly when purchasing rare or high-value natural diamonds.
Raremonds offers GIA Origin Certification where available and non-Russian provenance documentation for buyers who need additional documentation for compliance requirements in markets such as the USA and EU.
This creates greater transparency around the origin and documentation of the natural diamond.
Bespoke Diamond Sourcing
Not every jewellery design can be fulfilled through standard diamond inventory. Designers may require an exact colour, shape, carat weight, millimeter range, intensity, or combination of stones.
Raremonds provides:
- Custom diamond sourcing
- Precision matching
- Custom cutting
- Made-to-spec diamonds
- Calibrated layouts
- Bespoke diamond programs
The objective is to source or create diamonds around the requirements of the jewellery design rather than forcing the design to fit available inventory.
Bespoke Jewellery Manufacturing
Raremonds also provides bespoke jewellery manufacturing for private collectors, jewellery designers, boutique brands, and trade professionals.
The service can support:
- Custom jewellery production
- High-jewellery projects
- White-label jewellery
- Design-to-production execution
- Premium jewellery manufacturing
For US-based brands and private clients looking for both specialist natural diamonds and jewellery manufacturing, this provides an opportunity to work with one specialist partner throughout the process.
Final Thoughts
The USA offers a diverse natural diamond market, particularly through established jewellery and diamond centres such as New York’s Diamond District. Buyers can choose from specialist wholesalers, manufacturers, retailers, and international suppliers serving the US market.
However, the best natural diamond supplier in the USA depends on what you actually need. A buyer sourcing standard round diamonds may prioritize inventory and pricing, while a high-jewellery designer may need specialist knowledge of colour, matching, rare shapes, provenance, and custom cutting.
For buyers seeking natural coloured diamonds, rare stones, special cuts, precision-matched layouts, and bespoke diamond sourcing, Raremonds offers a specialist approach supported by more than 15 years of natural coloured diamond expertise.
Frequently Asked Questions
1. Who are the best natural diamond suppliers in the USA?
Some notable suppliers include Raremonds, New York Diamond Exchange, OM Jewels, Fine Star Diamonds NY, KGK International, Sheetal Group USA, Sundara Diamonds, Diamond By Empire, Mann Gems, and D. Nitin & Co. The best option depends on your diamond requirements, certification needs, budget, and whether you need wholesale or bespoke sourcing.
2. Why choose Raremonds for natural diamonds in the USA?
Raremonds specializes in natural coloured, white, rare, and special-cut diamonds. The company also provides precision matching, custom cutting, made-to-spec sourcing, provenance documentation, and bespoke jewellery services, making it suitable for complex jewellery requirements.
3. Does Raremonds supply natural coloured diamonds to the USA?
Yes. Raremonds serves private clients, jewellers, designers, collectors, and trade professionals worldwide, including buyers in the USA. Its coloured diamond expertise covers yellow, pink, blue, green, violet, orange, and Argyle diamonds, subject to availability.
4. Can Raremonds source matching diamonds for jewellery?
Yes. Raremonds provides precision-matched natural diamonds for earrings, bracelets, rings, multi-stone jewellery, and high-jewellery layouts. The sourcing process considers factors such as colour, saturation, proportions, and dimensions.
5. Can I order bespoke natural diamonds for a US jewellery design?
Yes. Raremonds offers custom-cut, made-to-spec, matched, and bespoke diamond sourcing services. Requirements can be developed around specific measurements, shapes, colours, intensities, proportions, and design tolerances.
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