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Title: granite
Caption: Sample of granite, showing its component minerals of quartz, feldspar, mica and hornblende. The pink crystals are feldspar. The quartz is gray, and the mica and hornblende are the dark spots.
Category: nature • Geology & Fossils
Credit: Album / Science Source / Doug Martin
Image size: 3604 × 2385 px | 24.6 MB
Print size: 30.5 × 20.2 cm | 1418.9 × 939.0 in (300 dpi)