Lab Grown Diamonds Wholesale RFQ Checklist: B2B Specification Guide

Lab Grown Diamonds Wholesale RFQ Checklist: B2B Specification Guide

A lab grown diamonds wholesale RFQ works best when it separates source-supported information, buyer requirements, and supplier representations. The supplied references include supplier, sourcing, buying-guide, and diamond-search pages. This guide uses those sources only for the points they directly support and treats the remaining guidance as buyer-side RFQ practice.

Before comparing price, define the product format, documentation, inspection criteria, substitution rules, shipment details, and commercial terms in writing.

1. Confirm the Supplier Model

One supplied supplier guide describes several supplier models for lab grown diamonds, including direct manufacturers, wholesale distributors, diamond trading platforms, and brokers Uniglo Diamonds. In an RFQ, the supplier model should be recorded as supplier-provided information. By itself, it does not prove ownership, availability, grading status, or shipment timing.

Ask each supplier to state the following for every quoted stone or parcel:

• Supplier model: manufacturer, distributor, platform inventory, brokered supply, or another stated model.
• Availability status: in stock, reserved, expected production, subject to confirmation, or another stated status.
• Ownership status, if the supplier discloses it.
• Whether the exact goods are available for inspection before shipment.
• Whether substitutions are allowed.
• Who must approve substitutions.
• Whether the quote, media, invoice, packing list, and supplied documents will identify the same stones or parcels.

Do not compare prices until the quote makes clear whether it covers identified goods, expected goods, or replaceable inventory.

2. Specify Diamond Type and Growth Method

Databazaar states that lab grown diamonds are produced through two primary methods: High Pressure High Temperature, abbreviated HPHT, and Chemical Vapor Deposition, abbreviated CVD Databazaar. The same source describes lab grown diamonds as having the same physical, chemical, and optical properties as mined diamonds, with origin as the key difference Databazaar.

For wholesale buying, make growth method a required RFQ field when it matters to the buyer. Use one of these instructions:

• CVD only.
• HPHT only.
• Either CVD or HPHT accepted.
• Growth method disclosed per stone.
• Growth method disclosed per parcel.
• Growth method not required.

If the buyer needs growth method listed on a grading report, packing list, spreadsheet, or invoice, state that document requirement directly.

3. Use Quote Fields That Can Be Checked

A supplied lab grown diamond search page includes fields such as shape, carat, cut, color, clarity, symmetry, polish, table, depth, length-to-width ratio, fluorescence, and lab report Whitehouse Brothers. Those fields can also be used in a wholesale RFQ when they are relevant to the buyer's product.

For a single-stone quote, request line-item fields such as:

| Field | RFQ instruction | |---|---| | Supplier stock ID | Required for each quoted stone | | Availability | In stock, reserved, expected, or subject to confirmation | | Shape | Exact shape requested and substitution rule | | Carat weight | Exact weight or accepted range | | Measurements | Length, width, depth, and diameter where applicable | | Color | Accepted grade or range | | Clarity | Accepted grade or range | | Cut | Required grade when the buyer uses a cut requirement | | Polish | Minimum accepted grade when required | | Symmetry | Minimum accepted grade when required | | Table | Accepted range when used by the buyer | | Depth | Accepted range when used by the buyer | | Length-to-width ratio | Required range for fancy shapes when used by the buyer | | Fluorescence | Accepted grade or exclusion requirement when used by the buyer | | Growth method | CVD, HPHT, either accepted, or disclosed per item | | Lab report | Issuing laboratory and report number when applicable | | Media | Image or video tied to the specific stone when used for approval | | Price basis | Price per stone, price per carat, currency, and quote validity |

For parcels, melee, layouts, and matched pairs, add count, total carat weight, millimeter range, matching rule, tolerance, and reject policy.

4. Define Documentation Before Shipment

One supplied wholesale guide references IGI, GIA, and HRD in a supplier-selection context for lab grown diamonds Uniglo Diamonds. Another supplied B2B sourcing discussion refers to IGI and GIA documentation in supplier evaluation Lepdo Diamonds. These citations support naming accepted report sources in an RFQ. They do not verify any specific stone, report, or supplier representation.

For reported single stones, request a line-item record with:

• Supplier stock ID.
• Shape and carat weight.
• Color, clarity, cut when applicable, polish, and symmetry.
• Measurements.
• Growth method if stated in the supplied documents.
• Grading laboratory.
• Report number.
• Report date if available.
• PDF, digital report link, or other report copy when available.
• Image or video if used for approval.
• Invoice line item that matches the quoted item.
• Packing-list reference that matches the shipment.

For melee, uncertified parcels, layouts, or matched goods, do not rely on broad commercial descriptions alone. State the size range, color range, clarity range, count or total carat weight, matching criteria, tolerances, inspection method, and reject process in writing.

5. Match the RFQ to the Product Format

Different product formats need different controls. Use the finished jewelry, inventory program, or resale format to decide which fields are mandatory.

| Product format | Technical fields to define | |---|---| | Single stones | Shape, carat, color, clarity, measurements, growth method, report requirement, media requirement, price basis | | Matched pairs | Shape, carat spread, millimeter spread, color range, clarity range, report requirement, visual matching rule | | Melee | Millimeter range, count, total carat weight, color range, clarity range, sorting tolerance, reject policy | | Parcels | Parcel ID, count, total carat weight, size range, color range, clarity range, make standard, packing format | | Layouts | Stone map, position IDs, size sequence, matching rule, replacement rule, media requirement | | Recurring inventory | Approved specification, reorder tolerance, document standard, packaging label format, substitution policy |

For fancy shapes, include dimensions and length-to-width ratio when those measurements affect the buyer's setting, matching, or visual standard.

6. Buyer Decision Table

| Decision area | What to request | Acceptance target | Buyer use | |---|---|---|---| | Supplier model | Manufacturer, distributor, platform inventory, brokered supply, or other stated model | Model disclosed without assuming ownership | Helps interpret availability and substitution risk | | Availability | In stock, reserved, expected, or subject to confirmation | Status stated per item or parcel | Keeps confirmed goods separate from uncertain goods | | Growth method | CVD, HPHT, either accepted, or disclosed per item | Matches buyer requirement | Supports buyer recordkeeping and disclosure controls | | Grading lab | Accepted labs and report requirements | Buyer-approved report sources | Keeps documentation requirements consistent | | Product format | Single stones, matched pairs, melee, parcels, layouts, or recurring inventory | Correct format for the order | Prevents mismatched quote types | | Shape | Exact shape and substitution policy | No substitution unless approved | Protects design and setting requirements | | Carat and dimensions | Carat range plus millimeter measurements | Fits buyer tolerance | Supports setting and visual consistency | | Color and clarity | Minimum and maximum accepted grades | Defined range by program | Controls assortment limits | | Cut, polish, symmetry | Minimum grades where required | Program-specific floor | Reduces quote ambiguity | | Fancy shape ratio | Length-to-width range and outline preference | Buyer-approved range | Supports visual matching | | Parcel matching | Sorting method and tolerance | Written standard before shipment | Reduces receiving disputes | | Media | Images, video, report PDFs, and packing list | Tied to specific stones or parcels | Supports pre-shipment review | | Commercial terms | Quote validity, lead time, payment, shipping, returns, and replacement | Approved before purchase order | Supports landed-cost comparison |

7. Practical RFQ Checklist

Use this checklist before requesting wholesale pricing.

• Buyer company name and shipping destination.
• Intended use or product program.
• Product category: single stones, matched pairs, melee, parcel, layout, or recurring inventory.
• Quantity, count, or target total carat weight.
• Shape or approved shape list.
• Carat range or calibrated millimeter size.
• Measurement requirements.
• Color range.
• Clarity range.
• Growth method requirement.
• Accepted grading laboratories.
• Report requirement by stone size or product type.
• Cut grade requirement when used by the buyer.
• Polish and symmetry minimums when used by the buyer.
• Table and depth range when used by the buyer.
• Length-to-width ratio for fancy shapes when used by the buyer.
• Fluorescence requirement when used by the buyer.
• Matching criteria for pairs, parcels, and layouts.
• Required report numbers, PDFs, stock IDs, and packing list.
• Image or video requirement for review.
• Quote format: price per stone, price per carat, parcel price, currency, and validity period.
• Availability status and lead time.
• Substitution policy.
• Shipping method and insurance responsibility.
• Import documentation requirements if applicable.
• Inspection window after receipt.
• Reject, return, and replacement process.
• Packaging and labeling requirements.
• Vendor onboarding or compliance documents required by the buyer.

8. Compare Quotes on Like-for-Like Terms

A supplied B2B sourcing discussion refers to certification, cut consistency, and pricing structures, including Rapaport-linked pricing references, in supplier comparisons Lepdo Diamonds. Use that as a reason to ask each supplier to disclose the pricing basis, not as proof that one pricing method is better than another.

A practical comparison process is:

1. Remove quotes that do not meet the buyer's required documentation standard. 2. Separate reported single stones from parcel, melee, or layout goods. 3. Compare only equivalent shape, growth method, carat, color, clarity, and report requirements. 4. Check measurements, table, depth, and length-to-width ratio before comparing price when those fields are part of the buyer's specification. 5. Confirm whether the goods are identified and available or subject to substitution. 6. Add shipping, insurance, duties, payment fees, and inspection costs when applicable. 7. Compare response completeness and exception notes, not only the headline price.

9. Resolve Red Flags in Writing

A red flag does not automatically disqualify a supplier, but it should be clarified before purchase.

Clarify any quote with:

• Missing report numbers for stones offered as reported or certified.
• Product details that do not match attached documents.
• Stock IDs that do not carry through the quote, media, invoice, and packing list.
• Broad color or clarity ranges with no sorting tolerance.
• Fancy shapes quoted without measurements when measurements are required.
• No substitution policy.
• Unclear quote validity or lead time.
• Parcel descriptions based only on total carat weight.
• Ethical, environmental, origin, or sustainability claims without supporting documentation.
• Photos or videos that cannot be tied to specific stones or parcels.
• Commercial terms introduced only after item selection.

RFQ Summary

A lab grown diamonds wholesale RFQ cannot verify supplier claims by itself. It can require the supplier to disclose the model, availability, growth method, report details, product specifications, media, inspection window, and commercial terms in a format the buyer can check.

For recurring buying, keep a specification library by product type. Record the approved shape, carat or millimeter range, color, clarity, measurements, ratio, report requirement, matching standard, packaging format, and substitution rule. Future quotes can then be compared against an existing standard instead of being negotiated from scratch each time.