The 4Cs of Moissanite

Learn how GIA grades are established, and how those grades affect a gemstone's appearance and price. Moissanite on the market today are all lab created which yields top tier qualities in each of the Cs. Lab grown Moissanites that did not meet these tier standards have not been released for retail sale.

Color

Color refers to the natural body color of a gemstone and not to the reflection of spectral colors that flash when it moves. The less color a diamond exhibits, the higher the rarity, and therefore the higher the value.

The standard GIA diamond color grading scale was never designed to rate moissanite. Unlike diamonds, which range from colorless to brownish to fancy yellow, moissanite can carry undertones across the board from green to yellow to gray. It’s a beautiful, brilliant and highly dispersive jewel that stands on its own, creating a unique jewelry category unto itself. Only near-colorless moissanite, graded as "VG–Very Good," is available for sale.

D
Absolutely colorless or icy white
E
Colorless with miniscule traces of color under 10x magnification
F
Colorless with slight traces of color under 10x magnification
G
Near-colorless with some traces of color noticeable
H
Near-colorless with slight color noticeable
I
Near-colorless with visibly detected color

Clarity

Clarity refers to how clean or clear a gemstone is with respect to natural microscopic characteristics that were trapped within while the gemstone was forming. Internal characteristics are known as inclusions, and characteristics on the surface of the gem are known as blemishes.

Since Charles & Colvard® moissanite is essentially lab-created using natural elements, Charles & Colvard (the sole manufacturer of moissanite) is able to control the entire process and ensure the highest quality gemstone with the greatest care in regards to “Clarity.”

FL-IF
Flawless to internally flawless
VVS1-VVS2
Very very slight inclusions
VS1-VS2
Very slight inclusions
SI1-SI2
Slightly included

Cut

Cut refers not to the shape, but to the balance of proportion, symmetry and polish achieved by the gemstone cutter. The extent of how well a gemstone is cut is directly related to its overall beauty. When correctly cut, the gemstone's ability to reflect and refract light is greatly enhanced.

Every Charles & Colvard Created Moissanite® jewel is precisely calibrated and hand-cut by a master technician to create maximum brilliance and spark the ultimate fire. While standard round brilliant continues to be the most popular cut for moissanite, fancy cuts are also available in limited quantities.

IDEAL
Exquisite quality cut that reflects nearly all light that enters the gemstone.
VERY GOOD
Quality cut that reflects slightly less light as the ideal cut.
GOOD
Average cut that reflects decent amount of light.
FAIR
Below average cut that reflects some light.

Carat

Carat is the traditional measuring unit of a diamond's weight (1 carat = 200 milligrams). A carat is divided into 100 "points," so the same diamond can be represented as weighing a carat and a half, 150 points or 1.50 carats. Moissanite stones are about 15 - 18% lighter than diamonds. Therefore, while a 6.5mm round diamond weighs 1.0 carat, a 6.5mm moissanite weighs 0.83 - 0.85 carat. However, the two stones would be the same actual size: 6.5mm in diameter.

In order to minimize the confusion this can create, all stones are listed on Gema&Co with their actual size in mm and/or the diamond equivalent in carats.