Hopeite is a rare zinc's hydrate phosphate, whose best samples were found in the Kabwe Mine (now called Broken Hill), in Zambia. This sample, collected in the 70's, is rich in nice red crystals, that cover the whole piece.
Formula :
Zn3[PO4]2 * 4 H2O
System: orthorhombic Hardness:3½ Rarity:rare
Strunz id:VII/C.11-20 -
PHOSPHATES, ARSENATES and VANADATES
Name origin: After Thomas Charles Hope (1766-1844), Professor of Chemistry, University of Edinburgh.
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 Specimen weight:14 gr.
 Crystal size:Up to 7 mm
 Overall size: 27mm x 21 mm x 35 mm
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