Set of 4 minerals on cubes: cubic Pyrite on matrix, optical Calcite, Chalcopyrite, Dodecahedral Pyrite.
MINERAL
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Black Tourmaline from Brazil (8.2 kg), black base
Crystal with prehistoric water on brass machinery
Brazilian agate slice (490g.) on a brass base
Agate slice with crystallized heart from Brazil
Apophyllite on chalcedony under glass (India)