|
Home
diamond engagement rings
Diamond Alternative Engagement R
Buying A Vintage Engagement Ring
Celebrity Inspired Custom Made E
Looking For An Engagement Ring
Color
Classic rings
Diamond Rings
Antique rings
| |
Color
Diamonds can occur in nearly any color, though yellow and brown are by far the
most common.[3] "Black" diamonds are not truly black, but rather contain
numerous dark inclusions that give the gems their dark appearance. When the
color is saturated enough in yellow or brown diamonds, a stone may be referred
to as a fancy colored diamond by the gem trade, otherwise they are graded for
color in the normal color range of white diamonds. Colored
diamonds contain impurities or structural defects that cause the coloration,
while pure or nearly pure diamonds are transparent and colorless. Most diamond
impurities replace a carbon atom in the crystal lattice, known as a carbon flaw.
The most common impurity, nitrogen, causes a slight to intense yellow coloration
depending upon the type and concentration of nitrogen present.The
Gemological Institute of America (GIA) classifies low saturation yellow and
brown diamonds as diamonds in the normal color range, and applies a grading
scale from 'D' (colorless) to 'Z' (light yellow). The GIA labels diamonds that
have more color than a 'Z' diamond fancy, along with those that are any color
other than yellow or brown.[citation needed]
|
