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Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock
From Greek tephra, ashes from Indo-European base, to burn
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Granite is a very hard, granular, crystalline igneous rock which consists mainly of quartz, mica, and feldspar and is often used as building stone
From Italian granito, which means grained rock, from grano grain, and from Latin granum
Coarse Grained Rock, Opaque Rock