krohnkite crystals up to 1,8 cm from the deposits at Chuquicamat with the classic intense neon color from the type locality.
Formula :
Na2Cu[SO4]2 * 2 H2O
System: monoclinic Hardness:2½-3 Rarity:rare
Strunz id:VI/C.16-10 -
SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
Name origin: After B. Kröhnke, who first analyzed the mineral.
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 Specimen weight:43 gr.
 Crystal size:Up to 1,8 cm
 Overall size: 55mm x 40 mm x 28 mm
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