Moissanite color grades use the same letter scale as diamond color grading — from D (completely colorless) through Z (strongly yellow or brown). In practice, moissanite is produced in a much narrower range than diamond, typically from D through J, with the vast majority of quality moissanite falling in the D–H range. Understanding what each grade actually means — and which grade makes sense for your ring — is one of the most useful decisions you can make before buying.
The Color Scale: What the Letters Mean
- D: Absolutely colorless. The highest grade on the scale. No warmth whatsoever, even under magnification by a trained gemologist. The rarest and most expensive grade.
- E: Colorless. Virtually indistinguishable from D to the naked eye. Extremely minor traces detectable only under magnification by experts.
- F: Colorless. Minor color detectable only under magnification. To the naked eye and in normal viewing conditions, F is indistinguishable from D or E.
- G: Near-colorless. When viewed face-up in a setting, appears colorless. Slight warmth detectable only when compared side-by-side with a DEF stone or when viewed loose from the side.
- H: Near-colorless. Similar to G but with slightly more detectable warmth. In a yellow or rose gold setting, this warmth is typically completely masked by the metal. In white gold or platinum, the faintest warmth may be perceptible under certain lighting to a trained eye.
- I/J: Near-colorless, approaching slightly tinted. Warmth may be perceptible to a non-expert in white gold or platinum settings. In yellow or rose gold, completely acceptable.
DEF vs GH: The Practical Difference
The most important practical question for most buyers is: is there a visible difference between DEF (colorless) and GH (near-colorless)?
The honest answer:
- Face-up in a ring, in normal lighting: The difference between D and G is not visible to a non-expert. Both will appear colorless when set and worn.
- Side by side, loose stones, compared against a white background: A trained gemologist can distinguish them. A non-expert typically cannot.
- In a white gold or platinum setting: DEF is marginally preferred because the cool white metal provides no masking of any warmth. GH is still entirely acceptable for most buyers.
- In a yellow or rose gold setting: GH is indistinguishable from DEF in normal wear. The warm metal completely masks any subtle warmth in the stone. Choosing DEF over GH in a yellow gold ring provides no visible benefit in daily wear.
Moissanite vs Diamond Color Grading: An Important Note
Moissanite's color grading uses the same letter scale as diamond grading, but there is a nuance: moissanite has a slightly different optical character than diamond, and some gemologists note that moissanite's warmth — when present — can have a faint greenish or grey tint rather than the yellowish warmth seen in lower-grade diamonds. This is specific to moissanite and is more relevant at lower grades (I/J) where any tint becomes more perceptible.
For DEF and GH grades, this distinction is not relevant in practice — the stone appears colorless.
Which Grade Should You Buy?
White Gold or Platinum Setting
- Recommended: DEF (colorless)
- Acceptable: GH — will appear colorless in normal wear to non-experts
- Avoid: IJ in bright white metal settings if color matters to you
Yellow Gold Setting
- Recommended: GH (near-colorless) — the warm metal masks warmth; DEF offers no visible advantage
- Perfectly acceptable: DEF if you prefer the highest grade regardless
- Also acceptable: IJ in yellow gold for budget-conscious buyers
Rose Gold Setting
- Recommended: GH — the blush tone of rose gold masks warmth effectively
- Acceptable: DEF or IJ depending on budget and preference
Color Grade and Price
In moissanite, the price difference between DEF and GH grades is typically modest compared to the equivalent difference in natural diamonds. The color-grade premium in moissanite is smaller because the production process can be controlled to target specific grades — unlike natural diamonds where D-color is extremely rare.
For many buyers, choosing GH in a yellow gold setting and using the saving toward a larger carat weight or better setting is the pragmatic choice.
Our Default Grade
All Moissanite Shine moissanite is DEF colorless as standard unless otherwise specified. Every stone is certified and the color grade is documented in the accompanying certificate.
Related reading:
Moissanite Clarity Guide: VVS, VS, SI — What Actually Matters?
Moissanite Cut Quality Guide: What Makes an Ideal Cut?
Moissanite Certification Guide: GIA vs GRA vs IGI Explained