Metamorphic
Greenish Metamorphic Rock (likely containing epidote or chlorite)
Metamorphic rock, possibly epidosite or greenstone
Hardness varies (generally 5-7), pale green to grayish-green color, dull to earthy luster, massive to granular texture, no distinct cleavage in hand specimen.
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Physical properties
Hardness varies (generally 5-7), pale green to grayish-green color, dull to earthy luster, massive to granular texture, no distinct cleavage in hand specimen.
Formation & geological history
Formed through regional or contact metamorphism of basic igneous rocks (like basalt) or occasionally sedimentary rocks, involving hydrothermal alteration.
Uses & applications
Very common rock type; has no significant industrial or gemological use. It might be used locally as aggregate or landscaping material.
Geological facts
Rocks with this greenish tint are often grouped into the 'greenstone facies', indicating low-grade metamorphic conditions.
Field identification & locations
Identified by its distinctive pale green color, often mottled with darker or lighter minerals (like quartz or feldspar). Found in many ancient geological terranes, especially in shields and orogenic belts.
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