
1) Metamorphic rock
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https://www.crosswordclues.com/clue/granulite

Granulites are a class of high grade metamorphic rocks of the granulite-facies that have experienced high-temperature and moderate pressure metamorphism. They are medium to coarse–grained and mainly composed of feldspars sometimes associated with quartz and anhydrous ferromagnesian minerals, with granoblastic texture and gneissose to massive str...
Found on
http://en.wikipedia.org/wiki/Granulite

• (n.) A whitish, granular rock, consisting of feldspar and quartz intimately mixed; -- sometimes called whitestone, and leptynite.
Found on
http://thinkexist.com/dictionary/meaning/granulite/

(from the article `metamorphic rock`) ...diopside, and plagioclase; in general, these minerals form relatively equant crystals and hence do not develop a preferred orientation. The ... ...of oceanic crust and island arcs (long, curved island chains associated with intense volcanic and seismic activity) that formed during the early ... ...
Found on
http://www.britannica.com/eb/a-z/g/59

A metamorphic rock with coarse interlocking grains and little or no foliation.
Found on
http://www.encyclo.co.uk/local/22392
Gran'u·lite noun [ From
Granule .]
(Geol.) A whitish, granular rock, consisting of feldspar and quartz intimately mixed; -- sometimes called whitestone, and leptynite.
Found on
http://www.encyclo.co.uk/webster/G/51

Granulite is a whitish, granular metamorphic rock, consisting of feldspar and quartz intimately mixed. Granulite is formed deep in the Earth's crust at very high temperature and under high pressures. It is sometimes called whitestone or leptynite.
Found on
http://www.probertencyclopaedia.com/browse/HG.HTM

A metamorphic rock with coarse interlocking grains and little or no foliation.
Found on
http://www.scientificpsychic.com/etc/geology-glossary.html

granulite A coarse-grained metamorphic rock in which the minerals are of roughly equal size.
Found on
http://www.wordinfo.info/words/index/info/view_unit/937/
No exact match found.