Diamond Guide

Cut

The cut of a diamond does not refer to it's shape, where natural instinct would tell you, rather we are interested in the proportions of the diamond.  A raw diamond/ rough diamond or unpolished regardless of it's shape whether round, princess, pear, marquise or oval gets it's brilliance based on the cutting and polishing of the diamond facets which allow the maximum amount of light to enter and reflect and disperse through the top of the diamond.  A diamond can be cut to shallow or too deep, which does not allow the light to be reflected back through the top and ultimately does not allow the maximum beauty of the diamond to be realized.

Color

The color of a diamond is a natural occurrence and can range in every color of the rainbow.   A diamond's color has a significant impact on the appearance and value of the diamond. and A diamond that is colorless completely allows the light to pass through and be dispersed as the colors of the rainbow.  The color scale of a diamond can range from D being colorless to Z being light yellow.

Clarity
The clarity is determined based on the inclusions found on a diamond, which can be considered nature's birthmarks and are the characteristics that make a stone unique.  Clarity is determined by the amount and location of these inclusions in the diamond when viewed under 10 power (10x) magnification. The majority of diamonds sold commercially have inclusions which are undetectable to the untrained eye.  GIA rates clarity grades in diamonds on a scale from Flawless to Imperfect
Carat Weight

The carat is the standard unit of measurement used when measuring the weight of diamonds and gemstones.  Carat weight is measured to three decimal points and is rounded to the nearest hundredth.  The rarity of larger, high-quality diamonds has resulted in significant price escalations between sizes. For instance, a one-carat diamond can command four to six times more than a half-carat diamond.