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This stone internationally is nominated as a granite. A coarse to very coarse-grained, dark grey-green quartz monzonite.
Monzonite: An intermediate igneous intrusive rock composed of approximately equal amounts of sodic to intermediate plagioclase and orthoclase feldspars with minor amounts of hornblende, biotite and other minerals. Each granite, being a product of nature, is a unique piece, a precious stone and it can present itself with color and structure variations.
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