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Polybasite Pyromorphite & Galena

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PJM42312

Polybasite Pyromorphite & Galena

Description Tabs

Description
Locality: 
Junction Mine, Block 14 opencut, Broken Hill, Yancowinna County, New South Wales, Australia
Size Range: 
Cabinet (10-18 cm)
Size: 
4 × 10 × 9.7 cm
Description

Labeled as plumosite and pyromorphite, this specimen is composed of white calcian pyromorphite and brown pyromorphite over grown with secondary spongy galena, with has small but defined crystal faces. On the mounded area at one end of the specimen there are some flat polybasite and silver crystals

Mineral Data
What's on the rock

Polybasite

Formula: 
[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
Strunz: 
2.GB.15
Crystal System: 
Monoclinic - Prismatic
Hardness: 
2.5 - 3.0
Streak: 
black

Pyromorphite

Formula: 
Pb5(PO4)3Cl
Strunz: 
8.BN.05
Crystal System: 
Hexagonal
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Zschopau, Erzgebirge, Saxony, Germany

Galena

Formula: 
PbS
Strunz: 
2.CD.10
Crystal System: 
Isometric
Hardness: 
2.5
Colour: 
Lead-grey
Streak: 
Lead-grey
Earthstones Australia

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