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Chemical Formula: SiO2
Mineral Name: Chalcedony
Color: Varying shades of Red
Hardness: 7
Specific Gravity: 2.65 - 2.66

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A cryptocrystalline quartz, carnelian's red color is due to the presence of iron impurities in the form of iron oxide. The stone is usually cut into cabochon, or into beads, and is also used for intaglios and cameos.

Carnelian is found in the regions of Arabia and Egypt, India, China, Colombia, Saxony, Scotland, West Germany and USA. Beautiful imitations of cornelian are made by the staining of agate. It is used in making