April Birthstone - DiamondPhysical and Chemical PropertiesChemical compositionDiamond is composed of the element Carbon The hardness of diamond is 10 on the Mohs Scale---there is nothing harder. The figure 10 could be said represent the "average" hardness of a diamond.ColorsThe most common diamonds are colorless, but this april birthstone also can be yellow or even a dusty black. Other colors include red, green, purple, blue, and pink. They are valued according to four qualities known as the four C's: color, cut, clarity, and carat.Back to April Birthstones Summary Page
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