Jadeitite

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Jadeitite is a rare metamorphic rock found in blueschist grade metamorphic terrains. It is found in isolated metasomatically altered bodies within serpentinite associated with subduction zone environments. Jadeitite consists almost entirely of jadeite pyroxene and is typically mined as a source of the ornamental rock or gemstone, jade. Occurrences include Myanmar, Guatemala, Japan, Kazakhstan and in the Coast Ranges of western North America.

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