Carnelian
A semi-transparent mineral only distinguished by its colors (the various shades of red) from agate, jasper, etc. Finest specimens of this mineral come from India; it has a glimmering lustre and is sometimes found a dark blood-red, passing into a greenish-brown. It is infusible. Its composition is silex 94, alumina 3.5, lime 1.5, oxide of iron 0.75. Carnelian was much preferred by the ancients for engraving upon. See PRECIOUS STONES.