A wholesale buyer once returned a 6.5 mm moissanite because the clarity certificate said VS2 but she could see a black speck with her naked eye at arm's length. The supplier pointed to the certificate; the buyer pointed to the stone. Both were right. Clarity grades describe inclusions under 10x magnification, but retail customers shop with the naked eye. The gap between lab clarity and eye-clean is the whole ballgame for wholesale moissanite.
This guide defines what "eye-clean" actually means on a moissanite, which clarity grades qualify, and how to set expectations with retail accounts.
What eye-clean means
A stone is eye-clean when, viewed face-up at a normal reading distance (about 20-25 cm) under a standard daylight lamp, a person with normal eyesight cannot see an inclusion without magnification. GIA's clarity grading scale runs from FL (flawless) to I3 (included), but the scale was built for diamond and under 10x magnification. For moissanite, the practical threshold is simpler: if you can see it without a loupe, it is not eye-clean, regardless of the letter on the certificate.
Which grades are usually eye-clean
On well-cut round moissanite:
- VVS1-VVS2: always eye-clean, inclusions are microscopic.
- VS1-VS2: usually eye-clean, especially if the inclusion is under a prong.
- SI1: eye-clean about 70% of the time; it depends on inclusion location.
- SI2 and below: roughly 50/50; do not rely on it for center stones.
- I1-I3: not eye-clean; reserve for melee and side stones hidden in pavé.
Step cuts (emerald, asscher) are less forgiving because the open table shows inclusions more clearly. On emerald-cut moissanite, VS2 is the practical floor for center stones, not SI1. We cover the step-cut difference in emerald step-cut clarity and the cushion variant in cushion clarity choice.
Why SI1 is a buying decision, not a default
SI1 moissanite wholesales for 10-15% less than VS2. For studs and fashion rings where the stone is viewed at arm's length, an eye-clean SI1 is a smart buy. For an engagement solitaire where the customer will stare at the table for the next decade, pay the 15% and take the VS2. The clarity decision pairs with the color decision in D-F vs G-H allocation; together they set the retail price bracket.
Gray cast and how to spot it
Some moissanite stones show a faint gray or dark cast in certain lighting, especially around the pavilion. This is not an inclusion; it is a cut and growth-zone feature. It matters because a gray-cast stone looks dirty to a customer comparing it to a white diamond, even if the clarity grade is clean. Test by viewing the stone under overcast daylight, not under a warm lamp. If the stone reads gray, reject it regardless of the VS grade on the certificate. Reputable suppliers cut gray-cast stones out of the D-F VVS parcel; they appear more often in the commercial grade.
How to test eye-clean yourself
Set the stone on a white paper on your desk. Turn on a daylight-balanced lamp. Stand at your normal reading distance and look at the table. Rotate the stone. If you see a dark dot, a cloud, or a feather, it is not eye-clean. Write the result on your internal spec sheet even if the certificate says VS. We cover the full incoming inspection in parcel grading checklist.
How lighting changes clarity perception
A stone that looks clean under warm yellow light can show inclusions under cool daylight or LED display lighting. This matters because the boutique display case and the customer home window light are different. When you inspect a stone, look at it under two light sources: warm lamp and cool daylight. If it is clean under both, it is clean. If it shows a cloud only under cool light, discount it or move it to a fashion piece where the lighting is warm and controlled.
Is VVS worth the premium on moissanite?
For 6.5 mm and below, no. VS2 is eye-clean and saves you 20-25%. For 8 mm and above, VVS starts to matter because the larger face shows smaller inclusions.
Do inclusions affect moissanite durability?
Most moissanite inclusions are growth features inside the crystal, not structural cracks. They do not chip or break under normal wear. The exception is feathers that reach the surface; those can chip under prong pressure. Inspect the girdle as part of your parcel check.
Should I tell customers the clarity grade?
Yes, on the spec card. Pair the grade with "eye-clean" language so the customer knows what it means. The FTC jewelry guides require truthful disclosure, and transparency builds trust.
Can inclusions be hidden under prongs?
Yes, and bench jewelers do this routinely. If a stone has a small inclusion near the girdle edge, orient it under a prong during setting. You cannot hide a table inclusion; do not try.
Order from HOLYCOME. Every stone ships with a GRA clarity grade, and we pre-inspect for eye-clean before the parcel leaves the bench. If a stone arrives that is not eye-clean at 20 cm, we replace it within 14 days. Apply for a wholesale account and request the current clarity-tier price list.
