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Jalpaite & Mckinstryite

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MNR172420

Jalpaite & Mckinstryite

Rare Mineral

Description Tabs

Description
Locality: 
Vrančice, Příbram District, Central Bohemian Region, Czech Republic
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.4 × 2.4 × 2 cm
Description

Jalpaite and Mckinstryite are both rare Ag, Cu minerals. Very good sample!

Mineral Data
What's on the rock

Jalpaite

Formula: 
Ag3CuS2
Strunz: 
2.BA.45
Crystal System: 
Tetragonal - Ditetragonal Dipyramidal
Hardness: 
2.0 - 2.5
Streak: 
Black
Type Locality: 
Leonora Mine, Jalpa, Mun. de Jalpa, Zacatecas, Mexico

Mckinstryite

Formula: 
Ag5-xCu3+xS4
Strunz: 
2.BA.40
Hardness: 
1.5 - 2.5
Type Locality: 
Foster Mine, Coleman Township, Cobalt area, Cobalt-Gowganda region, Timiskaming District, Ontario, Canada