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Diamond Carat     Online Diamond Guide, Diamond Color,Cut,Carat,Clarity,learn about diamond                        Online Diamond Guide, Diamond Color,Cut,Carat,Clarity,learn about diamond               Online Diamond Guide, Diamond Color,Cut,Carat,Clarity,learn about diamond            Online Diamond Guide, Diamond Color,Cut,Carat,Clarity,learn about diamond                 

Measures Diamond size.  Instead, “carat”
measures diamond weight.  One “carat”
equals 200 milligrams, or 20%of a gram.  

Not all diamonds of the same carat-weight
appear to be the same size, however.
Apparent size depends upon the shape of the rough stone and precisely how it was cut
and finished.  For example, a one-carat diamond that is unusually deep may appear
smaller (looking  down from the top)  than a better-proportioned, more expertly cut one-
carat stone (see “Cut”, below).

Gemstone weight also is expressed in “points:”  One carat equals 100 points.  So a half-
carat gem is “50 points,” a quarter-carat gem can be described as “25 points.”  A gem
greater than one carat can be described in both carats and points, for example as “1.63
carats,” or “one carat, sixty-three points.”

Diamond price is founded on rarity. Obviously, large diamonds are radically more rare than
small ones. Therefore, the price of a diamond that weighs, say, a full carat is dramatically
greater than twice the cost of a similarly graded half- carat diamond.

The combined carat-weight of all the stones in multi-gem jewelry frequently is described in
terms of the total carat weight (TCW) of all combined stones in the piece.

(Don’t confuse “Carat,” [gemstone weight] with “Karat,” [percent of pure
gold in an alloy]. For example, 24-karat is 100% gold; 12 karat is 50% gold;
other metals comprise the remaining 50% of the alloy.)