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Anglesite

#37964

Anglesite

#37964
Availability
Sold
Size
2 x 1.5 x 1.5 cm - Thumbnail 
Formula
PbSO4 (RRUFF)
Locality
Touissit dist., Oujda-Angad prov., Oriental, Morocco

Gemmy amber colored wedge-shaped crystals to 1cm in a cluster of at least 10 crystals. The mines of Touissit were recently covered in an article in the Nov/Dec 2013 issue on the Mineralogical Record by Steffen Jahn and Rainer Bode. Of course the Anglesite from this locality were found in much larger crystals in the early 1980's to 5cm. Some of the crystals were treated (accidentally or on purpose) to bring out the color. This specimen was NOT treated as can be seen in a small chip off the crystal at the bottom, which internally shows the same color.

The mines around Touissit are classified by geologists as Mississippi Valley Type. As in the mines of Illinois, Kentucky and Tennessee, the Touissit district contain large mineable lead-zinc replacement deposits hosted within dolomite beds. Concentrations of ore are located along structured and are also stratigraphically controlled. In contrast to the US midwest MVT deposits, the Touissit deposits are fluorine deficient.

Anglesite

Formula
PbSO4 
Crystal System
Orthorhombic 
Crystal Habit
Granular, Stalactitic 
Cleavage
Good, Distinct, None 
Luster
Adamantine 
Color
blue, colorless, green, gray, yellow 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
2.5-3 

Data courtesy of Webmineral.

Collection
Waldner Collection
Mineralpedia
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Previously Sold Anglesite
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WebMineral
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