7 Nisan 2015 Salı


CARNELIAN: A reddish-brown semiprecious stone used for beads, seal stones, and jewelry in antiquity. The Indus Valley civilization, Greeks, and Romans valued the stone. Engraved carnelians in rings and signets have offered information about the manners and customs of ancient Greeks and Romans. It is a translucent variety of the silica mineral chalcedony that owes its color to hematite (iron oxide). Carnelian is usually found in volcanic rocks, such as the Deccan Traps of western India, and is also found in Brazil, Australia, Africa, and the Nile Valley. [cornelian]

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