A jeweler in Phoenix ordered 120 round brilliant moissanites at a “near-colorless” price point last spring. When the stones arrived, the three best ones looked icy; the rest, set side by side in a display tray, showed a visible warm cast toward the bottom of the tray. He lost two custom orders because brides compared the center stone to a side stone and noticed the difference. The supplier had shipped a mixed D–H parcel and called it “colorless.” This is the single most common complaint we hear from buyers entering bulk round brilliant purchases, and it is entirely preventable if your PO specifies the right thing.
Round brilliant is roughly 60% of our wholesale volume, which also means it is the shape with the most vendors and the widest range of inspection discipline. Below is the standard we publish for round brilliant parcels and how to use it on your next order.
Why round brilliant color drifts in bulk
Moissanite is naturally near-colorless to slightly greenish-gray depending on crystal growth, and manufacturers grade it on their own internal scale. A few cost pressures push bulk parcels off-color:
- Mixed growth batches. Cheaper parcels combine rough from multiple growth runs to fill a carat weight, and the color across those runs varies.
- Optical masking. A round brilliant’s brilliance hides warmth better than any other shape, so a warm stone looks fine loose and turns yellow once set beside a cool side stone.
- “Eye-clean” shorthand. Many suppliers use eye-clean as a catch-all that quietly excuses color drift.
| Standard | Industry bulk norm | Our round brilliant parcel |
|---|---|---|
| Color range | D–H mixed, marketed as “colorless” | D–F only, sorted into three trays |
| Face-up warmth | Not measured | Rejected if visible at 30cm, north light |
| Clarity | VS-ish, mixed | VVS eye-clean, no black inclusions under table |
| Certificate | Optional | GRA on every stone, laser-inscribed |
The spec we write into every round brilliant PO
We hold round brilliant parcels to the following tolerances, which sit about 20% tighter than the trade baseline:
- Color: D, E or F only, sorted per tray so a buyer can compare within grade. No H-or-warm stones in a “colorless” parcel.
- Cut: ideal/super-ideal proportions — table 54–60%, pavilion depth 42–43%, crown angle 34–35. We reject stones with a heavy pavilion that leaks light.
- Clarity: VVS eye-clean; specifically, no black crystal inclusions visible through the table facet, because that is the one round-brilliant flaw clients spot immediately.
- Finish: no burn marks, no extra facets outside the standard 57/58, no polish lines visible under 10x.
- Hardness: moissanite at Mohs 9.25, so rounds are durable for daily wear; we still edge-check for chips on the girdle.
How to buy, by account type
First-time bulk buyer (under 50 stones)
Buy one carat bracket at a time — do not spread 50 stones across seven carat sizes. Pick the bracket your local clientele actually asks for (usually 1.0–1.2ct or 1.5–2.0ct) and take 20 stones in that bracket. Color consistency matters more than breadth.
Established boutique (50–300 stones)
Add a second color tray. Stock the D–F core plus a small E–F warm-safe bracket for clients who prefer a softer look. Your display tray should never mix the two; label them.
Private-label / OEM program
We produce rounds to your proportion spec and your carding. For private-label accounts we hold a 50-stone minimum per carat bracket and lock the color sort in your contract. Our GRA documentation travels with every stone; US high-jewelery accounts can request IGI statements on request.
Frequently Asked Questions
What is the best carat size to buy in bulk?
Most boutiques see the fastest turnover at 1.0–1.2ct and 1.5–2.0ct. Buy one bracket deep rather than several brackets thin; a tray of matched color in one size outsells a spread assortment two to one.
Are round brilliant moissanites colorless like diamonds?
Our D–F rounds face up colorless to slightly cool, comparable to a G–H diamond. Pure D-color moissanite is rare; what matters for retail is that the parcel is internally consistent, not that one stone is flawless.
What MOQ applies to a round brilliant parcel?
The opening MOQ is 20 loose round brilliants mixed in your chosen carat bracket. Reorders start at 10 stones. Private-label programs carry a 50-stone minimum per bracket.
Do you provide matching side stones for rings?
Yes. Every center round can be paired with matched small rounds (1.3mm–2.5mm) cut from the same growth batch so color matches through the setting. We recommend ordering center and sides in the same PO.
What is the defect rate on your round brilliant parcels?
Measured over the last 12 months, parcel defect rate is 1.6%, mostly girdle chips caught in transit. Stones failing our spec are replaced or credited within 30 days.
Takeaways
- Specify D–F only, sorted by grade, on every round brilliant PO.
- Buy one carat bracket deep, not several brackets thin.
- Require ideal/super-ideal proportions and GRA certification on every stone.
- Order center and side stones from the same batch for color match.
Request a round brilliant sample parcel: 20 stones, your choice of carat bracket, ships in 5 business days. See the full round brilliant collection, compare cut guides, or start a wholesale account. We also stock ready-to-sell engagement rings for accounts that prefer finished goods.