The international unit of weight, used for measuring diamonds and gemstones. 1 carat is equal to 200 milligrams, or 0.2 grams.
CHOOSE A DIAMOND CUT:
Good cut: Quality at a lower price than a very good cut, still producing a beautiful diamond for the budget-minded.
Very Good cut: Very slightly less measurable fire or sparkle than an ideal cut diamond, at a more affordable price.
Excellent cut: Highest cut grade. Its proportions produce a beautiful balance of fire and sparkle in a diamond.
Pure Hearts cut: Top 1% of diamond quality - with precise proportions, polish and symmetry = allowing the diamond to reflect even more light than the standard Ideal cut.
CHOOSE A COLOUR GRADE:
There is a hint of yellow tint that can be observed with the naked eye without any comparison.
Near Colourless: The yellow tints are insignificant. Color may be detectable when compared to much higher "colourless" grades.
Colourless: None or minute traces of color, but can only be detected by expert gemologist. usually set with platinum or white gold settings.
CHOOSE A CLARITY GRADE:
Slightly Included (SI1, SI2 & SI3): Contains noticeable inclusions under 10x magnification, including clouds, knots, crystals, cavities, and feathers.
Very Slight Included (VS1 & VS2): Contains minute inclusions, such as clouds, crystals, or feathers, which are difficult to locate with 10x magnification.
Very Very Slight Included (VVS1 & VVS2): Contains minute inclusions that are extremely difficult to locate under 10 x magnifications.
Flawless, Internally flawless (FL & IF): Contains no internal inclusions when viewed with 10x magnification. Internally Flawless diamonds may contain external characteristics (also known as blemishes).
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.
The precision and alignment of a diamond's facets and the resulting effects on its brilliance.
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 height of a diamond, measured from the culet to the table, divided by its average girdle diameter. One of the basic proportions that contributes to a diamond's appearance, brilliance and fire.
The width of the diamond's table expressed as a percentage of its average diameter. A component of the overall cut grade, this measurement is critical to a diamond's light performance.