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Porphyry is a reddish-brown to purple igneous rock containing large phenocrysts of various minerals embedded in a fine-grained matrix
From Old French porfire, from Italian porfiro and in some cases directly from Latin porphyrites
Fine Grained Rock, Opaque Rock
Talc carbonate is nothing but a rock sequence or a mineral composition found in metamorphic ultramafic rocks.
From medieval Latin, talcum
Fine Grained Rock, Opaque Rock