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Metamorphic Rock

How is greenstone made?

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2007-12-01 23:41:55

Greenstone, also known as greenschist, is a non layered

metamorphic rock derived from basalt, gabbro or similar rocks

containing sodium-rich plagioclase feldspar, chlorite, epidote and

quartz. Chlorite and epidote give the green color. New Zealand Jade

or Greenstone ( Pounamu in Maori ) comes in four main types:

Kawakawa, Kahurangi and Inanga are Nephrite or Calcium Magnesium

Silicate.

Tangiwai is Bowenite or Iron Magnesium Silicate.


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