Set of 4 minerals on cubes: cubic Pyrite on matrix, optical Calcite, Chalcopyrite, Dodecahedral Pyrite.
MINERAL
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Purpurite from Brazil (2.2kg), under rectangular glass and black base
Extra amethyst from Brazil (765g), displayed in a cage
Purpurite from Brazil (1.2kg), on black base
Amethyst from Uruguay (675g) in a cage
Fluorite ball -Marienschacht Mine , Wölsendorf, , Germany-
Purple Botryoidal chalcedony from Sulawesi, on black base