Wholesale Lab Grown Diamond Prices: B2B RFQ and Supplier Comparison Guide

Wholesale Lab Grown Diamond Prices: B2B RFQ and Supplier Comparison Guide

**By Vincent Xi, Editorial Author** Author profile: https://originlabdiamonds.com/authors/vincent-xi/

The **wholesale price of lab grown diamonds** is not a single market number. For B2B buyers, it is a supplier quote tied to a defined specification, documentation requirement, quantity, delivery window, and commercial terms. A per-carat figure is useful only when the compared goods and terms are actually equivalent.

This guide is for retailers, jewelry manufacturers, private-label brands, and procurement teams comparing lab grown diamond quotes. It does not state Origin Lab Diamonds' prices, certifications, production capacity, inventory status, fulfillment model, or service capabilities. Those points should be verified directly in a current supplier quotation and supporting documents.

Executive Buying Takeaways

• Compare quotes by exact specification, not headline per-carat price alone.
• Confirm whether quoted goods are certified, supplier-graded, or uncertified.
• Separate stone price from total landed cost, including shipping, insurance, duties, payment fees, and return handling.
• Verify whether inventory is live, reserved, or subject to final confirmation.
• Treat published price ranges as market context, not binding supplier offers.

What Wholesale Pricing Means

One supplied wholesale pricing guide describes wholesale lab grown diamond pricing as the per-carat or per-stone price paid by buyers such as retailers, manufacturers, procurement teams, and high-volume online jewelers before retail markup https://lepdodiamonds.com/lab-grown-diamond-wholesale-price-guide/.

For procurement, a useful quote should identify the goods clearly. At minimum, request carat weight, shape, color, clarity, cut grade where applicable, polish, symmetry, measurements, growth method if disclosed, certificate laboratory if any, report number when available, quantity, delivery timing, payment terms, and inspection terms.

A lower quoted price is not automatically the better buy if the quote excludes certification, shipping, insurance, return handling, replacement terms, or confirmation that the goods are available.

Current Price Context to Use Carefully

Published price references can help buyers identify quotes that need further explanation, but they should not be treated as live offers. Market guides may use different geographies, publication dates, certificate assumptions, inventory positions, exchange rates, and minimum order quantities.

| Data point | Unit, scope, date context, and source | Buyer use | |---|---|---| | **US$800 to US$2,500 per carat** | U.S. dollars per carat for lab grown diamonds in a wholesale and retail market discussion, presented in a **2026 pricing guide** https://lgdusallc.com/blog-details/lab-grown-diamond-price-per-carat-in-2026-average-cost-pricing-guide | Use only as a broad reasonableness check, not as a supplier offer. | | **0.50 carat, 1 carat, and 2 carat** | Stone-size examples discussed in the same **2026 pricing guide** https://lgdusallc.com/blog-details/lab-grown-diamond-price-per-carat-in-2026-average-cost-pricing-guide | Request quotes by exact carat weight or accepted carat range because broad size categories do not price identically. | | **2 production methods: HPHT and CVD** | Production-method categories named in a lab grown versus natural diamond comparison article https://solitairelabdiamond.com/blog/post/lab-grown-vs-natural-diamonds | Ask whether growth method is disclosed and whether it affects merchandising, documentation, or internal buying rules. | | **4 supplier source types** | Direct manufacturers, wholesale distributors, diamond trading platforms, and brokers described as source options for jewelers https://www.uniglodiamonds.com/lab-grown-diamond-supplier-jewelers | Compare price together with accountability, documentation, stock confirmation, and replacement access. | | **2018 FTC context** | The supplied **2026 pricing guide** states that the FTC recognized lab grown diamonds as real diamonds in **2018** https://lgdusallc.com/blog-details/lab-grown-diamond-price-per-carat-in-2026-average-cost-pricing-guide | Treat lab grown diamonds as a defined product category while still verifying grading reports and seller disclosures. |

If a supplier quote sits far above or below a published reference, ask what explains the difference. Relevant factors may include certificate laboratory, cut quality, shape, size, matching requirement, stock availability, payment terms, logistics, and whether the quote matches the requested specification.

Main Price Drivers to Compare

The supplied pricing sources describe lab grown diamond prices as affected by carat weight, cut, color, clarity, certification, growth method, and market conditions https://lepdodiamonds.com/lab-grown-diamond-wholesale-price-guide/ https://lgdusallc.com/blog-details/lab-grown-diamond-price-per-carat-in-2026-average-cost-pricing-guide.

| Price driver | What the buyer should request | Why it matters | |---|---|---| | Carat weight | Exact weight or acceptable range | Price and availability can change by size category. | | Shape | Required shape and acceptable alternatives | Shape affects comparability between quotes. | | Cut and make | Cut grade for round stones; proportions, measurements, and appearance expectations for fancy shapes | Two stones with the same carat, color, and clarity can differ in visual appearance. | | Color and clarity | Accepted grade range and whether substitutions are allowed | Wider ranges may improve availability but can affect finished jewelry consistency. | | Certification | Accepted grading laboratory and report requirement | Independent grading can support internal controls and customer-facing documentation. | | Growth method | HPHT, CVD, either accepted, or not material to the order | Some buyers track growth method for disclosure, assortment, or internal policy reasons. | | Quantity and mix | Single stone, matched pair, calibrated parcel, melee, or mixed order | A parcel quote is not directly comparable to a single certified-stone quote. | | Lead time | Ship date, shipment origin, and partial-shipment rules | Delivery timing affects production schedules and customer commitments. | | Total landed cost | Stone price plus freight, insurance, duties, payment fees, and return costs | The lowest stone price may not produce the lowest completed purchase cost. |

Supplier Models and Pricing Tradeoffs

A supplied supplier guide describes **4 source types** for jewelers: direct manufacturers, wholesale distributors, diamond trading platforms, and brokers https://www.uniglodiamonds.com/lab-grown-diamond-supplier-jewelers. Each model should be evaluated through the same RFQ and documentation process.

| Supplier model | What may differ | Verification question | |---|---|---| | Direct manufacturer | Production-side communication and sourcing route | Can the supplier document grading, availability, shipment timing, and replacement terms for the quoted goods? | | Wholesale distributor | Assortment access and consolidated buying process | Are prices, certificates, and stock status current for each stone or parcel? | | Trading platform seller | Side-by-side comparison of listed goods | Who is accountable for inspection issues, returns, and replacement goods? | | Broker | Sourcing support for specific or hard-to-match requests | What margin, timeline, documentation, and responsibility are included in the brokered quote? |

The shortest supply chain is not automatically the best purchasing route. Documentation, replacement access, payment terms, shipment handling, and accountability can matter as much as quoted unit price.

RFQ Checklist for Comparable Quotes

A strong RFQ turns price comparison into a controlled buying process. Include these fields when requesting quotes:

• Buyer company name, billing country, shipping country, and contact person.
• Purchase type: single certified stone, matched pair, calibrated parcel, melee, or mixed inventory.
• Shape requirement and acceptable alternatives.
• Carat weight or acceptable carat range.
• Color range and clarity range.
• Cut grade requirement for round stones.
• Make, proportion, and measurement expectations for fancy shapes.
• Certification requirement, including accepted grading laboratories.
• Growth method preference, if relevant.
• Quantity required now and expected repeat-order need.
• Target delivery date and whether partial shipment is acceptable.
• Request for stone images, videos, certificates, or report numbers where available.
• Invoice details, SKU format, and packing requirements.
• Payment terms and accepted currencies.
• Shipping, insurance, duty, and return responsibility.
• Inspection window after receipt.
• Replacement, credit, or refund process for mismatched or nonconforming goods.
• Quote expiration date and inventory hold policy.
• Total landed cost, not only per-carat or per-stone price.

For negotiation, buyers can ask suppliers to quote example volume scenarios such as a **20 percent order increase**, **50 percent order increase**, or **100 percent order increase**. These percentages are example RFQ assumptions to verify in the supplier quote, not market benchmarks.

Certification and Documentation Checks

The supplied pricing and supplier sources mention recognized laboratories such as IGI and GIA in the context of lab grown diamond grading and trade buying https://lgdusallc.com/blog-details/lab-grown-diamond-price-per-carat-in-2026-average-cost-pricing-guide https://www.uniglodiamonds.com/lab-grown-diamond-supplier-jewelers.

Do not assume every quoted diamond is certified. Ask whether each stone is certified, supplier-graded, or uncertified, and confirm which grading report applies to which stone. If a supplier references a laboratory, standard, certification, or compliance claim, request the current document or report number before treating the claim as verified.

A grading report is different from a supplier's own sales description. Buyers should distinguish the grading laboratory's reported characteristics from the seller's separate claims about origin, availability, service terms, or fulfillment capability.

Documentation should match the buyer's sales channel. A retailer may need report numbers and customer-facing certificate access. A manufacturer may prioritize calibrated measurements and repeatable parcel sorting. A private-label brand may need consistent invoice language and SKU data.

When the Lowest Quote Is Not the Best Buy

The lowest quote may be appropriate when the goods match the specification, documentation is complete, inventory is confirmed, and inspection terms are clear. It becomes risky when the quote omits certificate details, excludes logistics costs, depends on unconfirmed stock, or gives no practical remedy for nonconforming goods.

The supplied comparison article describes lab grown diamonds as chemically, physically, and optically equivalent to mined diamonds and identifies HPHT and CVD as production methods https://solitairelabdiamond.com/blog/post/lab-grown-vs-natural-diamonds. That product-category context does not replace stone-level inspection, report verification, and purchase-document review.

A controlled B2B buying decision should cover the full purchase cycle: quotation, grading evidence, inventory confirmation, shipment, inspection, replacement, replenishment, and landed cost.

Methodology and Source Context

This guide uses only the supplied source URLs for market context. Pricing context is drawn from published wholesale and market-price guides that discuss per-carat pricing, quality factors, certification, and market conditions https://lepdodiamonds.com/lab-grown-diamond-wholesale-price-guide/ https://lgdusallc.com/blog-details/lab-grown-diamond-price-per-carat-in-2026-average-cost-pricing-guide. Supplier-model and product-category context is drawn from trade articles discussing source types, lab grown versus natural diamond attributes, and HPHT/CVD production methods https://www.uniglodiamonds.com/lab-grown-diamond-supplier-jewelers https://solitairelabdiamond.com/blog/post/lab-grown-vs-natural-diamonds.

The RFQ tables and buyer checklists are purchasing structures derived from those source contexts. They are not supplier-specific claims about Origin Lab Diamonds or any other company.

Limitations and What to Verify

Published price guides can become outdated and may not reflect a buyer's geography, certificate requirement, order size, payment terms, shipment route, currency, or inspection standard. Before placing an order, verify current pricing, certificate status, report numbers, stock availability, inspection rights, return terms, shipment origin, insurance coverage, duties, payment fees, and total landed cost directly with the supplier.

For companies evaluating Origin Lab Diamonds or any other potential supplier, the practical next step is to issue a detailed RFQ and compare responses line by line against the same specification, documentation requirements, and commercial terms.