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Senegalite On Augelite & Turquoise

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CLB34168

Senegalite On Augelite & Turquoise

Type Locality

Description Tabs

Description
Locality: 
Mount Kourou Diakouma, Saraya, Kedougou, Senegal
Size Range: 
Cabinet (10-18 cm)
Size: 
5 × 12.6 × 10.4 cm
Largest Crystal: 
0.30cm
Description

This is one of the best specimen from my 2007/2008 find! Many vugs in limonite matrix, some of them containing turquoise/augelite-stalactites (the augelite is blue to blueish-white) covered with hundreds of perfectly developed senegalite crystals!

Some of the vugs contain the best crystal quality there is - elongated crystals with very good luster and color!

Two vugs are completely covered with senegalite crystals, others show free standing perfect senegalite crystals and one has lightly brownish-greeen elongated crystals of the biggest size known.

Very rare paragenesis.

Mineral Data
What's on the rock

Senegalite

Formula: 
Al2(PO4)(OH)(OH)2·H2O
Strunz: 
8.DE.05
Hardness: 
5.5
Type Locality: 
Mount Kourou Diakouma (Kouroudiako), Saraya, Falémé River basin, Tambacounda Region, Senegal

Augelite

Formula: 
Al2(PO4)(OH)3
Strunz: 
8.BE.05
Crystal System: 
Monoclinic
Hardness: 
4.5 - 5.0
Streak: 
White
Type Locality: 
Västanå Iron Mine (Westanå Mine), Näsum, Bromölla, Skåne, Sweden

Turquoise

Formula: 
Cu(Al,Fe3+)6(PO4)4(OH)8·4H2O
Strunz: 
8.DD.15
Crystal System: 
Triclinic
Hardness: 
5.0 - 6.0

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