Small Size Lab Grown Diamond Wholesale Price
Product Details
Short answer: buying small lab grown diamonds wholesale comes down to three specifications — the exact millimetre size, whether the parcel is calibrated (sieved) to a tolerance, and whether the colour and clarity are matched across the batch. Get those three right and price becomes comparable between suppliers. Get them wrong and you are comparing two different products.
What counts as “small size” in lab grown diamonds
Small sizes sit below roughly 3 mm and cover what the trade calls melee and accent goods. They are the stones that make pavé bands, halos, eternity rings, tennis bracelets and accent settings work. Individually they are cheap; in a setting they are the difference between a piece that looks precise and one that looks assembled.
| Category | Approximate diameter | Typical use |
|---|---|---|
| Melee | 0.7 – 1.5 mm | Pavé, halos, micro-set bands |
| Small accents | 1.6 – 2.2 mm | Channel set, borders, side stones |
| Small centre-adjacent | 2.3 – 2.9 mm | Eternity bands, three-stone sides, studs |
| Near-melee | 3.0 mm and above | Usually quoted with single stones, not parcels |
Calibrated vs uncalibrated — the spec that decides your setting cost
Calibrated (sieved) stones are sorted to a stated tolerance around a target diameter, typically ±0.05 mm on small sizes. Uncalibrated goods are sold as they come off the sieve, so a “1.3 mm” parcel will contain a spread of sizes.
Why this matters commercially: a setting jig cut for 1.3 mm seats a calibrated 1.3 mm stone in one motion. Feed it an uncalibrated parcel and the setter spends time sorting and rejecting, or forces stones into seats that do not quite fit — which shows up later as loose stones and customer returns. The price gap between calibrated and uncalibrated goods is almost always smaller than the labour gap it creates.
Cut: why small stones are not cut like centre stones
Below about 1.5 mm, a full 57-facet round brilliant stops paying for itself — the facets are too small to return light and the girdle gets thin. Most melee in this range is cut as a single cut (17 or 33 facets), which holds its shape better and sets more securely. If a supplier quotes “round brilliant” melee at 1.0 mm, ask for the facet count; the answer tells you whether they know the goods they are selling.
What actually drives the per-carat price
| Factor | Effect on price | What to check |
|---|---|---|
| Size | Price per carat rises steeply as size increases | Quote every size separately — never accept a blended per-carat figure |
| Colour | D–F commands more than G–J | Ask for the colour range of the parcel, not the best stone in it |
| Clarity | VVS vs VS vs SI | On small stones, ask for an eye-clean guarantee instead of a grade label |
| Calibration | Sieved goods cost more, save labour | Ask for the tolerance in millimetres, in writing |
| Matching | Colour-matched parcels cost more | Ask whether the parcel is matched or merely sorted |
| Volume | Larger lots quote better | Ask where the next price break sits |
How to write an RFQ that gets a comparable price
- Size in millimetres, with the tolerance — for example “1.30 mm ±0.05”.
- Colour and clarity range for the parcel as a whole, not the best stone.
- Cut — single cut or full brilliant, and the facet count if it is small.
- Quantity in carats, plus the number of pieces if you are setting to a jig.
- Matched or unmatched, and whether you need a colour consistency guarantee across reorders.
- Delivery form — loose parcels, or pre-sorted into setting trays.
Without points 1 and 2, two quotes are not comparable, and the cheaper-looking one usually turns out to be a wider parcel at a lower grade.
Quality control on small parcels
You cannot inspect ten thousand melee stones one at a time, so inspect the parcel instead. Spread a scoop on white paper under daylight and look for colour banding — patches that go warmer or colder across the scoop mean the goods were not matched. Then check for “fisheye” stones, where the pavilion is too shallow and the centre goes dark. A 5% rejection rate on an unmatched parcel is normal; on a matched parcel it should be close to zero.
Frequently asked questions
Are small lab grown diamonds cheaper than natural melee?
Generally yes, and the gap is widest in the small sizes where natural melee has been in tight supply. But compare like with like: the meaningful comparison is price per carat at the same millimetre size, colour range and calibration tolerance.
Can small lab grown diamonds be detected?
Yes. Standard melee screening equipment flags them, and a laboratory report on a sample from the parcel will confirm growth method. If a supplier claims their small goods “pass as natural”, that is a red flag about the supplier rather than a feature of the product.
What is the smallest size you can supply?
Below roughly 0.7 mm the goods stop being practical to set by hand and the per-carat price stops being meaningful. Tell us the setting you are filling and we will tell you the smallest size that actually works in it.
Do you supply matched parcels for repeat orders?
That is the specification to agree up front. Ask for a retained reference parcel so that the next batch can be matched against it — otherwise a reorder six months later will not sit flush next to the first run.
How are small stones packed and shipped?
In sealed parcels or vials with the weight and grade written on the label, so that what arrives can be checked against the invoice before the parcel is opened.
Can you supply stones already sorted into setting trays?
Yes. Pre-sorted trays cost more per carat but remove the sorting step from your setter, which is usually the higher cost.
