Eclogite is a rare and
It is the deepest one
of all metamorphic facies, formed under very hight pressures and
It is a beautiful rock
has green and sometimes also red minerals,
the green one is a pyroxene and the red one is garnet.
Other minerals include quartz, mica, pyrite, zoisite, rutile,
orthopyroxene and kyanite.
Eclogite. By GOC53 via Flickr.com
They can be foliated
but most often are not. They are medium to coarse grained.
They occur near basalts, and wherever they occur they are not large.