Garnet

Garnet, a well-known precious stone of a vitreous lustre, and usually of a dark-red colour, resembling a ruby, but also found in various other shades, e. g. black, green, and yellow. The finest specimens are brought from Ceylon, Pegu, and Greenland. The species of garnet crystal known as Pyrope, when cut in the shape of a tallow drop, is called a carbuncle.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)