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Gormanite & Siderite

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RMM108648

Gormanite & Siderite

Type Locality

Description Tabs

Description
Locality: 
Big Fish River, Yukon, Canada
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 2 × 1.5 cm
Largest Crystal: 
0.40cm
Description

Spruce-green radiating crystals of gormanite to 0.4 cm in association with gemmy, sharp crystals of golden siderite to 0.4 cm. A few perfect crystals of brazilianite and apatite up to 2.0 mm are scattered among the siderite crystals. Big Fish River is the co-type locality for gormanite.

Mineral Data
What's on the rock

Gormanite

Formula: 
(Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6·2H2O
Strunz: 
8.DC.45
Hardness: 
4.0 - 5.0
Type Locality: 
Rapid Creek, Dawson Mining District, Yukon Territory, Canada

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Streak: 
White

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