Wholesale Natural Diamonds for Jewellers and Trade Buyers

Uniglo Diamonds operates from Hoveniersstraat 30, Suite 662/Bus 250, 2018 Antwerp. Trade buyers can contact our team to discuss a sourcing requirement or arrange an appointment. Contact our Antwerp office.

We work with business buyers across different product and price requirements. Our company information describes B2B supply alongside in-house diamond manufacturing in Antwerp.

For a retailer, the brief may concern a diamond already promised to a customer. For a jewellery manufacturer, consistent dimensions and an agreed quantity may be central to the production schedule. Explain the intended use so that the discussion addresses the requirement behind the specifications.

If your business sources through RapNet, our Uniglo Diamonds on RapNet guide explains that purchasing route. You can also contact us directly with a stock reference or sourcing brief.

Our natural diamond catalogue lists individual stones with stock references and information such as shape, carat weight, colour, clarity and laboratory. These references provide a starting point for a trade enquiry.

For a customer order, send the relevant stock number or describe the diamond you need. Include the intended jewellery piece and any dimensions already agreed with your setter. If you are reviewing several alternatives, keep each stone’s reference attached to its specifications and quotation.

For stock replenishment, describe the combinations you regularly sell and the quantity required in each category. A request for several defined specification groups is easier to assess than a broad request for “good-quality natural diamonds”.

Our melee inventory includes natural diamond parcels as well as laboratory-grown options. Specify natural diamonds explicitly when requesting stones for a natural diamond collection.

For pavé, halos, bands or other production requirements, provide the cutting style, millimetre or sieve-size range, colour and clarity requirements, and quantity. State whether that quantity is a number of stones or a total carat weight.

Also explain the permitted variation. A parcel may fall within an agreed size range while still needing closer sorting for a particular setting. Ask how the proposed goods are sorted and what origin-screening information is available.

If you are matching an existing production batch, include its specification sheet and explain which characteristics must remain consistent. Confirm the suitability of the proposed parcel before committing it to production.

Uniglo’s manufacturing services cover bulk orders and custom cuts. A manufacturing enquiry should include the intended shape, target measurements, quantity and any design requirements that affect the finished stones.

Discuss feasibility, tolerances, documentation and timing before setting a delivery commitment with your customer. For an unusual outline or a design with tightly defined dimensions, provide a drawing or clearly labelled reference image.

If your brief includes a pair or set, explain how the stones will be used together and what degree of visual matching you require. Ask the team to confirm the available sourcing or manufacturing approach for that request.

A useful brief distinguishes essential requirements from preferences. This allows alternatives to be considered without losing track of what your customer or production team actually needs.

Include your company name, contact details and relevant stock references. Where the request concerns several categories, give each category its own quantity and specification.

For example, a hypothetical trade brief might request ten natural round diamonds, each weighing 0.30–0.39 carats, within G–H colour and VS2 clarity, with a stated laboratory preference and delivery destination. It should also explain whether all ten must be supplied together and which requirements may be adjusted if an exact match is unavailable.

That information makes the enquiry more precise while leaving the final selection and approval with the buyer.

If your business requires GIA reports, state that in the initial enquiry. Our natural diamond listings include stones described with GIA and IGI documentation; review the laboratory and report attached to each proposed stone. Browse natural diamond listings.

Report requirements should fit the goods being purchased. For an individual centre stone, request its full report and reference number. For a melee parcel, establish what the supplied quality description and screening documentation cover.

Natural origin also needs to be distinguished from treatment status. GIA explains that natural diamonds can receive treatments affecting colour or clarity, and that known treatments are recorded in its reports. GIA’s treatment guidance.

Agree the documentation your business needs before approving the goods. Our GIA natural diamond report guide explains report reading, verification and matching a report to an individual stone.

Begin through our contact page with your company details and sourcing brief. If you have already found suitable listings, include their stock references so the enquiry concerns identifiable stones.

The online inventory provides filters for characteristics including shape, carat weight, colour, clarity and laboratory, and prompts buyers to log in to view prices. You can also contact the team for a quotation on a specified requirement.

Include your required receipt date at this stage. For a customer order, distinguish that date from the later date when your finished jewellery must be ready.

When you receive options, compare them with the original brief. Review the individual specifications, reports and available imagery, and ask for clarification where an option differs from your requirements.

For a parcel, establish the quantity, total weight, sorting description and any agreed tolerances. For a pair or set, request an appropriate comparison of the stones together.

Confirm current availability before presenting a particular diamond as secured for your customer. If a reservation is needed, ask whether one is possible and obtain its conditions and expiry.

Before accepting a quotation, establish which stones or parcel it covers, the agreed quantity, total payable amount and payment conditions. Confirm delivery arrangements and any inspection or return terms that apply.

If an alternative stone is proposed later, review its own specifications and documentation before approving the substitution. Keep the agreed stock or report references with your purchase records.

Compare quotations on the same basis. A price per carat needs to be read with the applicable weight; a whole-stone price should identify the particular diamond. For parcels, confirm how the total is calculated and whether any sorting or other service charges are included.

Check the currency, applicable taxes, shipping, insurance and any additional charges. For custom work, establish which manufacturing services and laboratory documentation are included in the quoted amount.

If a volume discount is offered, ask which quantity and goods it applies to and how changes to the order affect the total. The quoted specifications and terms should remain clear as the order develops.

Our natural diamond price guide explains price comparisons more fully. For trade purchasing, use the quotation for the identified goods as the basis of your buying decision.

For an international enquiry, provide the destination country, business delivery address and intended recipient. Ask the team to confirm the available delivery arrangement, expected timing and documentation for that order.

Establish who arranges transport and insurance, which charges are included and what happens if the shipment is delayed. Distinguish the planned dispatch date from the date you need the goods in hand.

If you want to review diamonds in Antwerp, arrange an appointment and send your shortlist beforehand. Confirm which stones can be made available for the meeting before making travel arrangements.

Our Supply Chain Policy & Procedure sets out Uniglo’s responsible sourcing commitments and approach to due diligence. If your business has specific procurement requirements, include them with the initial enquiry and ask which supporting documents can accompany the goods.

Industry sourcing statements and laboratory grading reports serve different purposes. The World Diamond Council’s System of Warranties, for example, concerns warranty statements on B2B invoices and memos through the diamond supply chain. World Diamond Council guidance.

Tell us whether your business needs particular origin information, supplier declarations or transaction documentation. Establish what is available for the proposed diamonds before making corresponding claims to your own customers.

Contact Uniglo Diamonds with your company name, required shapes and sizes, quality specifications, laboratory preferences, quantity and delivery destination.

Include any shortlisted stock references and explain which requirements are essential. Ask for confirmation of the proposed goods, supporting documentation, current price and applicable trade terms so you can review the complete offer for your business.