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- CaratA CARAT is a measurement used to signify the weight of the diamond. It is the most precise of the four C's.
Diamonds are weighed in metric carats; one carat equals 1/5 gram or approximately 0.007 ounces. It takes a little over 142 carats to equal 1 ounce. Every carat is divided into 100 points. Therefore, a 50-point diamond is also called a ½ carat.
Diamond weight is so precise that polished diamonds are weighed to a thousandth of a carat and then rounded off to the nearest hundredth (point). Diamonds weighing less than 20 points are often called melee. Another term often used is the term grain, or grainer.
A grain equals one-quarter (0.25) of a carat. For example, a 75-point diamond would be called in the trade a three grainer and a one-carat stone may be called a four grainer. Loose stones are weighed directly on a scale but mounted stones can only be estimated by plugging their measurements into a mathematical equation. Another quick way of estimating mounted round diamonds is by measuring the diameter of the diamond and comparing it to a size chart.
Since the price of diamonds is based upon rarity, the larger the stone the rarer the diamond and the higher the price per carat. A one-carat stone is much rarer than two half-carat stones, and is therefore considerably more expensive.
Diamonds are sold by carat weight. In the diamond trade, price is given in price per carat and not in total dollars.
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LOS ANGELES DIAMOND FACTORY
CALIFORNIA JEWELRY MART · 607 S. HILL STREET #302 · LOS ANGELES, CA 90014
213-627-8700 · 818-DIA-MOND · 1-800-652-7237
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