Orthoclase, or orthoclase feldspar, is an important tectosilicate mineral which forms igneous rock, vintage line drawing or engraving illustration.

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Photo credit: © Patrick Guenette / Alamy / Afripics
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Keywords: art, black, crystal, drawing, engraved, engraving, geology, geometry, illustration, line, mineral, monoclinic, orthoclase, vector, vectors, vintage, white