51.5 MB (2.6 MB compressed)
5197 x 3465 pixels
43.9 x 29.5 cm ⏐ 17.3 x 11.6 in (300dpi)
DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
Harmotome crystals. Harmotome (hydrated barium-aluminium silicate) is a rare mineral belonging to the zeolite group of minerals. This sample is from the Samson mine, St Andreasberg, Harz Mountains, Germany. Actual width is 130 mm.
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