Carat Weight: One carat equals 1/5 of a
gram in weightFor diamonds under a carat, each carat is divided into
100 points – similar to pennies in a dollar. 0.75ct. = 75 points, ½ ct. = 50
points
Clarity: The GIA Clarity Scale includes
eleven clarity grades ranging from Flawless to I3.Given that diamonds
form under tremendous heat and pressure, internal and external characteristics
are common. These characteristics help gemologists separate natural diamonds
from synthetics and simulants, and identify individual stones.
There are
two types of clarity characteristics: inclusions and blemishes – the difference
is based on their locations. Inclusions are enclosed within a diamond while
blemishes are confined to its surface.
Color:
The GIA Color Scale extends from D (colorless) to Z (light yellow or
brown).Although many people think of gem quality diamonds as
colorless, most diamonds used in jewelry are nearly colorless with tints of
yellow or brown. Color grades are determined by comparing each diamond to a
master set. Each letter grade represents a range of color and is a measure of
how noticeable the color is.