53.9 MB (2.4 MB compressed)
5197 x 3623 pixels
43.9 x 30.7 cm ⏐ 17.3 x 12.1 in (300dpi)
DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
Barite. Aggregate of Barite crystals. Barite is a barium sulphate mineral that generally forms white or colourless crystals, but can occur in white to yellowish-white aggregates, as seen here. It is the main source of barium. This sample is from the St Andreasberg mine in the Harz mountains, Germany, and measures 210 mm wide.
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