The combination of the Four C's relates primarily to Value The metric carat equals 0.200 gram The small, flat, polished surfaces on a finished diamond are called Facets Most diamonds used in jewelry are Nearly colorless to very light yellow or light brown Diamond is composed primarily of Carbon Gem shapes and cutting styles other than the standard round brilliant are called Fancy cuts Clarity characteristics confined to the surface of a polished diamond are called Blemishes The term "point" in reference to weight is equal to 0.01 A gemstone's resistance to scratching is known as its Hardness On average, mine workers must process more than a ton of rock to recover A half carat of diamonds The flashes of color you see in a polished diamond are called Fire A standard round brilliant-cut diamond has 57 or 58 facets The term brilliant cut is used for gemstones with facets that Are mostly triangular or kite-shaped Compared to blemis