
Calcite,
CaCO3
Rueun, Grischun (Grisons), Switzerland
Photo & Coll. Th. Schüpbach,
SVSMF
Th. Schüpbach, Winterklüfte, Schweizer Strahler Vol. 8, Nr 10 (1990), p. 433 sq.
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A T H E N A |

Calcite,
CaCO3
Rueun, Grischun (Grisons), Switzerland
Photo & Coll. Th. Schüpbach,
SVSMF
Th. Schüpbach, Winterklüfte, Schweizer Strahler Vol. 8, Nr 10 (1990), p. 433 sq.