different between pyroxene vs pyroxenite

English

From French pyroxène, from pyro- + Ancient Greek ????? (xénos, “stranger”).

pyroxene (plural pyroxenes)

(mineralogy) Any of a group of crystalline minerals containing silicates of iron, magnesium and calcium.
- 2004, Richard Fortey, The Earth, Folio Society 2011, p. 10:
  By the pathside, there are occasional large boulders that shown black crystals the size of a fingernail; these are pyroxene minerals that had time to crystallise out deep within the chamber of liquid rock – or magma – beneath the volcano.

From pyroxene +? -ite.

pyroxenite (countable and uncountable, plural pyroxenites)

(geology) A heavy, dark igneous rock consisting mostly of pyroxene minerals with smaller amounts of olivine and hornblende.

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