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General outward appearance of the diamond.
The international unit of weight, used for measuring diamonds and gemstones. 1 carat is equal to 200 milligrams, or 0.2 grams.
The largest facet of a gemstone, located at the top. Table % is the table width as a percentage of the girdle diameter.
The height of a gemstone, from the culet to the table. Depth % is the height of the diamond as a percentage of the girdle diameter.
A measure of the visible light some diamonds emit when exposed to ultraviolet (UV) rays. Diamonds with a strong or very strong fluorescence are a better value because the market prices them slightly lower. It is quite rare for fluorescence to have any visual impact on a diamond's appearance, and it does not compromise the gem's structural integrity in any way.
The precision and alignment of a diamond's facets and the resulting effects on its brilliance.
The overall condition of a finished diamond's faceted surfaces, including how smoothly the facets have been polished, whether any marks are visible from the polishing wheel, and how defined the edges of each facet are. Polish marks are almost always invisible to the unaided eye, but good polish is essential for maximum light performance.
Superior quality cut that produces a striking balance of fire and brilliance. Only 3% of the world’s diamonds are excellent cut.
High quality cut that reflects almost as much light as an excellent cut diamond, yet at a more affordable price.
Good quality cut at a great value, without compromising beauty and sparkle.
Good quality cut which reflects some light while maximizing weight. While not as brilliant as a good cut, still a quality diamond.
Flawless. The ultimate in diamond clarity, completely free of internal or external flaws.
Internally Flawless. These rare and beautiful diamonds boast no internal flaws.
Very very slightly included 1. The inclusions are difficult to see even under 10x magnification.
Very very slightly included 2. The inclusions are difficult to see even under 10x magnification. They have only slightly more inclusions than VVS1 diamonds.
Very slightly included 1. Inclusions are difficult to detect under 10x magnification. Inclusions are not visible to the naked eye.
Very slightly included 2. Inclusions are difficult to detect under 10x magnification. Inclusions are typically not visible to the naked eye.
Slightly included 1. The inclusions are visible under 10x magnification, but are not very visible to the naked eye.
Slightly included 2. The inclusions are visible under 10x magnification, and may be visible to the naked eye.
D is the best color grade. These diamonds are totally colorless and very rare.
E diamonds feature slight traces of color that elude even a trained eye, earning them a colorless grade.
F diamonds have slight color which can only be detected by an expert gemologist. Although F diamonds have slightly more color than E diamonds, they are still classified as colorless.
Near-colorless at an exceptional value. These diamonds have color which is only noticeable when compared to higher color grades.
These diamonds have slight color, which tends to be more visible in diamonds over 1 carat.
Although these diamonds are slightly warm, they still offer a great value.