Natural Diamond Wholesaler – Certified Loose Diamonds in Bulk

OM Jewels Inc is a natural diamond wholesaler supplying certified loose stones to jewelry manufacturers, designers, and retailers across the United States, Europe, Australia, and Canada. Operating from New York’s Diamond District since 2018, we hold direct inventory of over 1,200 natural diamonds – round brilliants, rare fancy cuts, precision-matched pairs, and production-ready calibrated layouts.

We supply wholesale natural diamonds the way trade buyers actually need them: consistent across repeat orders, accurately graded, and available in the specific shapes and dimensions your designs call for. As a natural diamond manufacturer with direct sourcing relationships, we remove the layers of intermediaries that inflate cost and slow delivery.

Why Source From a Natural Diamond Wholesaler Direct

Buying from a natural diamond supplier in the USA who holds physical inventory changes the economics of your production line. There is no broker margin, no waiting while a listing is chased across a third-party network, and no uncertainty about whether the stone in the photograph is the stone that ships.

Manufacturer-direct sourcing of bulk natural diamonds delivers three things retail-facing supply chains cannot:

• Consistency across reorders. When you return for the same specification in six months, we can match it from inventory rather than approximating.
• True calibration. Stones are cut and sorted to dimension, not just carat weight – essential for channel settings and pavé work.
• Transparent grading. Certified natural diamonds wholesale, with documented reports where your production or client requires them.

If you are also evaluating sustainable alternatives for a particular collection, our Lab-Grown Diamonds Collection runs on the same sourcing and quality standards.

Our Wholesale Natural Diamonds Collection

Our inventory spans classic and unconventional cuts, giving designers room to work beyond the standard round. Buyers regularly source wholesale fancy cut diamonds from us for pieces where a round brilliant would read as generic.

Available across the collection:

• Round brilliant diamonds – the calibrated foundation of most production runs
• Baguette diamonds wholesale – straight and tapered, for channel and bar settings
• Trapezoid diamonds wholesale – side stones for three-stone and geometric designs
• Emerald, asscher, and princess cuts – step and mixed cuts in matched sizes
• Kite shape diamond wholesale – one of the most requested modern silhouettes
• Shield cut diamond supplier stock – angular accents for architectural settings
• Half moon, trilliant, and bullet cuts – precision-matched flanking stones
• Hexagonal, lozenge, and cadillac cuts – distinctive shapes for signature work
• Pear, oval, marquise, cushion, and heart – the full fancy shape range

Browse the complete inventory at our main diamond shop or filter this collection by shape, carat, colour, and clarity using the panel above.

Fancy Shape Diamonds Wholesale

Fancy shape diamonds wholesale is where OM Jewels is genuinely differentiated. Our cutting and sourcing network gives us access to shapes that most suppliers cannot hold in stock — bat, butterfly, coffin, tulip, star, Portuguese, and octagonal cuts alongside the established fancy range.

For designers producing limited runs or bespoke commissions, this matters. A distinctive silhouette is often the entire creative premise of a piece, and sourcing it should not take six weeks of phone calls. Explore the dedicated Fancy Shape Collection for the full range.

Matching Diamond Pairs Wholesale

Earrings, paired settings, and symmetrical designs demand stones that match across four dimensions simultaneously: colour, clarity, cut proportion, and millimetre measurement. Approximate matching is visible to the naked eye once the piece is finished, and it is the most common reason a production run gets rejected.

Our matching diamond pairs wholesale inventory is hand-selected and verified against all four criteria before it enters stock. We hold half moon diamond pairs, trapezoid pairs, trilliant pairs, ashoka pairs, and octagon pairs in commercial sizes, with larger and unusual pairings available on request.

See current stock in our Natural Diamond Pairs Inventory.

Calibrated Diamonds Wholesale and Production Layouts

Calibrated diamonds wholesale means stones cut to exact millimetre dimensions rather than sorted loosely by carat. For manufacturers running channel-set bands, pavé work, or repeat collections, calibration is what makes a design reproducible.

We supply calibrated side stones for jewelry production in graduated and uniform sizes, plus complete diamond layouts for jewelry manufacturers — pre-matched sets of fancy shapes selected to work together in a single multi-stone piece. Layouts remove the sorting labour from your bench and guarantee that every stone in the set belongs to the same batch.

View available sets in our Layouts Collection.

For designers working with texture and character rather than clarity, our Salt & Pepper Natural Diamonds offer an alternative aesthetic at accessible price points.

Certified Natural Diamonds Wholesale – Specifications

Every stone entering our inventory is inspected for authenticity, calibration accuracy, brilliance, and structural integrity.

Available specifications:

• Carat ranges: from melee through to statement stones
• Colour grades: D through N, plus fancy colours including yellow, champagne, grey, and rustic tones
• Clarity grades: IF through SI and beyond, including salt and pepper
• Cut quality: brilliant, step, criss-cross, rose, and antique cuts
• Dimensions: calibrated and matched to specification
• Certification: GIA and IGI grading available where required

Certified and non-certified options are both available, priced accordingly – many production buyers prefer non-certified for melee and side stones where a report adds cost without adding value.

Why Buy From OM Jewels Inc?

At OM Jewels Inc, we understand that sourcing diamonds is about more than price; it is about trust, reliability, quality, flexibility, and long-term relationships. We work closely with jewelers, designers, manufacturers, and diamond buyers to provide diamonds that meet their specific requirements.

Key Trust Signals

On-Time Delivery – We focus on reliable order processing and timely delivery to help our customers meet their production and customer commitments.

Custom Diamond Options – Need a specific shape, size, proportion, or specification? We offer customized diamond sourcing and creation options based on your requirements.

Short-Term & Long-Term Memo Options – Flexible memo solutions are available to help qualified buyers evaluate and work with diamonds before making a final purchase decision.

Certified Diamonds – We offer certified diamonds for buyers who require documented grading and quality assurance from recognized gemological laboratories.

Special Discounts on Bulk Orders – Competitive pricing and special discounts are available for qualifying bulk and larger-volume purchases.

Easy Return Policy – We aim to make the buying process straightforward by providing a customer-friendly return process, subject to applicable terms and conditions.

Strong After-Sales Support – Our relationship does not end after the sale. Our team remains available to assist with product questions, orders, documentation, and ongoing requirements.

Rush Order Fulfillment – When time is critical, we work to accommodate urgent requirements and fulfill rush orders whenever the requested diamonds are available or can be sourced within the required timeframe.

Bespoke Diamond Creation – Looking for something uncommon? We can work with you on bespoke diamond requirements, including unusual shapes, specifications, and custom-cut concepts.

Rare & Hard-to-Find Fancy Cuts – One of our key strengths is access to rare, unusual, and distinctive fancy diamond cuts that may not be readily available through the regular market. Our inventory and sourcing network can help buyers discover shapes and cuts that are difficult to find elsewhere.

A Better Source for Unique Diamonds

Not every diamond is easy to find, and that is where OM Jewels Inc. stands apart.

Our focus extends beyond commonly available shapes and sizes. We specialize in helping customers source rare fancy cuts, unusual shapes, matching pairs, and customized diamonds for distinctive jewelry designs.

Whether you need a unique diamond for a one-of-a-kind creation or a larger quantity for production, our team works to understand your requirements and find the right solution.

OM Jewels Inc – Your trusted partner for diamonds that are difficult to find, challenging to source, and made to meet specific requirements.

Natural Diamond Supplier – USA, Europe, Australia & Canada

We ship insured worldwide from our New York office, serving buyers in the United States, across Europe, in Australia, and throughout Canada. As a 47th Street diamond wholesaler based in the heart of the New York Diamond District, we combine the sourcing depth of the world’s largest diamond trading hub with direct shipping to your workshop.

Buyers working to different regulatory requirements – including current European import documentation standards – receive the grading paperwork appropriate to their market. Rush shipping is available where timelines are tight.

Bulk Natural Diamonds – Ordering and Pricing

Pricing on this collection is quoted rather than listed, because wholesale diamond pricing moves with market conditions, and because a single listed price cannot reflect volume, specification, and repeat-order terms. Wholesale typically runs meaningfully below equivalent retail — our guide to wholesale versus retail diamond prices breaks down where that margin comes from.

To request pricing, use the Request For Price button on any stone, or open a wholesale trade account for access to full inventory pricing. Minimum order quantities are flexible and set according to your requirements rather than a fixed threshold.

Frequently Asked Questions

Who are the best natural diamond wholesalers in the USA?

The strongest natural diamond wholesalers in the USA are those holding direct physical inventory rather than brokering third-party stock. OM Jewels Inc operates from New York’s Diamond District with over 1,200 natural diamonds in stock, specialising in fancy shapes, matched pairs, and calibrated layouts for trade buyers. Direct inventory means faster fulfilment and verified consistency across repeat orders.

Where can I buy loose natural diamonds in bulk for a jewelry business?

Loose natural diamonds in bulk are best sourced from a manufacturer-direct wholesaler that supplies the trade exclusively. OM Jewels Inc supplies bulk natural diamonds to jewelry manufacturers, designers, and retailers worldwide, with flexible minimum order quantities and volume pricing. Open a wholesale trade account to access full inventory and pricing.

How do I source calibrated diamonds for jewelry manufacturing?

Calibrated diamonds are cut to exact millimetre dimensions rather than sorted by carat weight, which makes designs reproducible across production runs. Source them from a supplier who calibrates in-house and can match specifications on reorder. OM Jewels Inc supplies calibrated side stones and complete matched layouts in graduated and uniform sizes.

Natural or lab-grown diamonds – which is better for wholesale resale?

Natural diamonds hold long-term resale value and remain the standard for heirloom, bridal, and luxury positioning. Lab-grown diamonds offer significantly lower cost per carat and appeal to sustainability-focused buyers, but have seen substantial price decline due to production oversupply. Most wholesale buyers now stock both, matching the material to the customer segment rather than choosing one exclusively.

How do jewelers find perfectly matched diamond pairs for earrings?

Matched pairs must align across colour, clarity, cut proportion, and millimetre dimensions simultaneously – matching on carat weight alone produces visible asymmetry in the finished piece. Source from a supplier holding dedicated matched-pair inventory verified against all four criteria. OM Jewels Inc maintains a pairs inventory across fancy and classic shapes.

What is a diamond layout and where do I buy one?

A diamond layout is a pre-matched set of stones sold together as a single lot, selected to match in size, colour, and cut for use in one multi-stone piece. Layouts suit pavé settings, channel-set bands, and graduated designs, removing sorting work from the bench. OM Jewels Inc supplies natural diamond layouts across twelve-plus fancy shapes.

Who are the trusted diamond suppliers in the New York Diamond District?

New York’s Diamond District on 47th Street is the largest diamond trading hub in the United States. Trusted suppliers there hold verifiable physical premises, offer documented grading, and supply the trade directly. OM Jewels Inc has operated from 20 W 47th Street since 2018, supplying certified natural and lab-grown diamonds to trade buyers globally.

What is the minimum order quantity for wholesale diamonds?

Minimum order quantities vary by supplier and product category – melee and calibrated stones typically carry higher minimums than individual fancy shapes. OM Jewels Inc offers flexible minimum order quantities set to the buyer’s requirements rather than a fixed threshold, accommodating both single-piece bespoke sourcing and full production runs.

How do I verify diamond certification when buying wholesale?

Check the certificate number directly against the issuing laboratory’s online database – GIA and IGI both provide free public report verification. Confirm that the stone’s laser inscription matches the report number, and that measurements on the certificate match the physical stone. Reputable wholesalers supply certificates before payment, not after.

Which supplier is best for fancy shape diamonds for custom jewelry?

The right supplier for fancy shape diamonds is one holding unusual cuts in physical stock rather than sourcing on request, since bespoke timelines rarely allow for extended searching. OM Jewels Inc stocks over thirty fancy shapes, including kite, shield, hexagonal, lozenge, cadillac, and rare cuts such as bat, butterfly, and tulip.