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

Example:
Where can I buy Eclogite? I've tried ebay and google with no luck.?

Taxonomy
Eclogite, Eclogite facies, diamonds, basalt, rocks, peridotite, partial melting, melt, composition, pressures, xenoliths, granulite, exhumation, metamorphism, depths, garnet, free encyclopedia, coesite.

Defination from the web:
eclogite can play an important role in driving convection within the solid Earth. ... Glaucophane and titanite (sphene) form in eclogite as pressures decrease during exhumation of the rocks, or may be earlier formed minerals that did not entirely react away. ...