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Title: granite
Caption: Sample of granite, showing its component minerals of quartz, feldspar, mica and hornblende. The white crystals are feldspar. The quartz is gray, and the mica and hornblende are the dark spots.
Category: nature • Geology & Fossils
Credit: Album / Science Source / Joyce Photographics
Image size: 3511 × 2304 px | 23.1 MB
Print size: 29.7 × 19.5 cm | 1382.3 × 907.1 in (300 dpi)