Bulk Loose Lab Grown Diamonds: Parcels and Volume Orders

A bulk order can contain several types of goods. It may consist of individually selected diamonds for customer orders, matched pairs for earrings, small diamonds for multi-stone jewellery, or separate groups supporting a collection.

These requirements should be described separately. A group of centre stones selected individually has different acceptance criteria from a parcel intended to fit repeated settings.

For a mixed order, divide the request into clear lines by shape, size range, quality requirements and intended use. This allows the supplier to quote each category and makes it easier to understand where specifications or availability differ.

For an overview of our broader trade offering, visit wholesale lab-grown diamonds.

State whether you need a particular number of stones, a number of matched pairs, a total carat weight or a combination of these requirements.

Carat measures weight rather than physical size, as explained in GIA’s carat-weight guidance. A parcel’s total weight therefore does not tell you its piece count or whether its diamonds will fit your settings.

For illustration, a parcel containing 500 diamonds with a total weight of 10.00 carats has an average weight of 0.02 carats per stone. That average does not establish the weight or measurements of every diamond in the parcel.

If your production requires a fixed number of usable stones, include that quantity explicitly. Ask whether any stated piece count is exact or estimated, and how variations between the quoted and final parcel weight will affect the invoice.

For repeat jewellery production, give the supplier the measurements your workshop needs. A nominal size should be accompanied by an agreed minimum and maximum where fit depends on a controlled range.

For round diamonds, discuss diameter and any relevant depth requirements. For fancy shapes, specify length, width and other features that affect the mounting. Obtain those limits from the jeweller or setter responsible for production.

Ask what “calibrated” means in the particular quotation. The useful information is the actual size range, the measurement criteria and how the supplier confirms that the goods fall within it.

Where a design needs several sizes, request each size group separately. Combining everything into one total parcel weight makes it harder to establish whether the order contains the correct quantity for each part of the design.

A parcel offered within a colour and clarity range still needs to be assessed against the visual result you want.

For example, a permitted colour range describes which grades may be included. It does not, by itself, establish that every combination of stones will make a visually matched pair or an even-looking row.

Explain where matching matters: within each pair, across one bracelet, around an eternity ring or throughout a repeat collection. Discuss visible size, colour appearance, outline and the consistency of the cutting style.

If you approve a sample, record what the approval covers. Keep the agreed measurements and matching criteria with that sample reference. Establish how the remaining goods will be assessed against those requirements, rather than treating a photograph of a few stones as evidence for the whole parcel.

Ask what the description “certified bulk diamonds” means in the actual offer.

For individually reported diamonds, request the laboratory and report references associated with each stone. IGI explains that its loose-diamond reports identify natural or laboratory-grown origin and document quality characteristics. IGI report information.

For small-stone parcels, establish whether the accompanying information describes screening, a parcel assessment, a supplier’s specification or individual grading reports. These documents and services answer different questions.

IGI describes diamond screening as identifying natural diamonds, laboratory-grown diamonds and simulants. Screening for origin does not automatically provide an individual colour, clarity and cut assessment for every stone. IGI diamond-screening services.

Ask which goods were examined, whether the stated scope covers the whole parcel or a sample, and how the documentation is linked to the delivered packet. A report for one representative diamond should not be presented as an individual report for all the others.

If your order specifically requires individually IGI-reported stones, see our IGI-certified lab-grown diamond wholesale page.

Confirm whether the quotation is expressed per stone, per pair, per carat or for the complete lot. Ask for the quantity, applicable unit price and total amount to be shown together.

When comparing suppliers or order sizes, keep the specifications consistent. A quotation for a broadly sorted parcel cannot be assessed fairly against one requiring tighter dimensions, closer matching and additional documentation without accounting for those differences.

Check what is included in the total. Sorting, matching, reporting, packaging, shipping, insurance and applicable taxes should be identified where relevant. Confirm the currency, quotation validity and any conditions attached to the offered quantity.

A larger order does not automatically provide better value. Compare the cost of the goods that meet your requirements and the additional work needed to make them usable. A lower headline price may be less attractive if your workshop must spend more time sorting or cannot use part of the parcel.

Ask whether a minimum applies to the overall purchase, an individual shape and size category, or a particular parcel.

This matters when combining goods. An order containing several specifications may be treated differently from the same number of diamonds in one specification. Confirm the conditions for each quoted line.

If you are considering a larger quantity, ask the supplier to quote the alternatives against the same brief. Any quantity discount should be visible in the quotation, together with the conditions that apply.

For recurring production, discuss whether staged deliveries are available. Establish which quantities are committed, whether stock is reserved and whether prices are fixed or require confirmation for each release.

Before approving the purchase, agree how the goods will be checked against the size, quality and matching requirements.

Clarify the inspection period, how discrepancies should be reported and whether the supplier permits partial returns or requires the complete parcel to be returned. Ask how opening, sorting, dividing or using part of a parcel affects the applicable terms.

Keep separate order lines and parcel references identifiable during inspection. This helps both businesses discuss a specific issue without uncertainty about which goods are involved.

For the full process covering purchase orders, dispatch, receiving checks and stock records, follow our lab-grown diamond sourcing workflow for jewellery businesses.

A clear request allows the supplier to respond to the actual production or stock requirement.

Where a requirement is flexible, say so. Where it is essential to setting fit, customer approval or production consistency, make that clear before the supplier proposes alternatives.

Send Uniglo Diamonds a breakdown of the goods you need, including quantities, shapes, size tolerances, quality requirements and documentation.

For jewellery production, include the matching criteria and any measurements confirmed by your setter. For several individually selected diamonds, include the requirements for each stone. If the order supports recurring production, describe the anticipated quantities and delivery pattern.

Contact Uniglo Diamonds to discuss the proposed bulk order, available options, current quotation and applicable terms.