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Black and white sketch of a granite rock with labels for Feldspar, Quartz, and Biotite minerals, and a 1 cm scale bar.

Black and white sketch of a granite rock with labels for Feldspar, Quartz, and Biotite minerals, and a 1 cm scale bar.
Pro

Sketch your specimen of granite and focus on the interlocking minerals. Label all phenocryst minerals. Include a scale. See more

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