eclogite

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A coarse-grained greenish rock consisting primarily of garnet and sodic pyroxene, and often including quartz, kyanite, and rutile.

Century Dictionary and Cyclopedia

1. n. The name given by Haüy to a rock consisting of a crystalline-granular aggregate of omphacite (a granular, grass-green variety of pyroxene) with red garnet. With these essential constituents cyanite (disthene) is often associated, and, less commonly, silvery mica, quartz, and pyrites. This is one of the most beautiful of rocks, and of rather rare occurrence. It is found in the Alps, in the Fichtelgebirge in Bavaria, in the Erzgebirge in Bohemia, and also in Norway. It occurs in lenticular masses in the older gneisses and schists. To the variety occurring at Syra in Greece, consisting largely of cyanite or disthene, the name cyanite rock or disthene rock has been given. Also spelled eklogite.

Wiktionary

1. n. a coarse-grained metamorphic rock, a mixture of pyroxene, quartz and feldspar with inclusions of red garnet

GNU Webster's 1913

1. n. A rock consisting of granular red garnet, light green smaragdite, and common hornblende; -- so called in reference to its beauty.