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Geometrical mineral formations

By gworthey | Published March 2, 2011 | Full size is 1813 × 1454 pixels

Geometrical mineral formations from Mundus Subterraneus (1665 edn.) vol. 2, pp. 28-9

Geometrical mineral formations

Geometrical mineral formations from Mundus Subterraneus (1665 edn.) vol. 2, pp. 28-9

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