Galena & Sphalerite, from Brownley Hill Mine, Nenthead, Alston Moor, Cumbria, UK (No.23)

£ 35.00
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Galena & Sphalerite, from Brownley Hill Mine, Nenthead, Alston Moor, Cumbria, UK (No.23)Galena & Sphalerite, from Brownley Hill Mine, Nenthead, Alston Moor, Cumbria, UK

Measurements Approx.
Height - 4 cm
Width - 3.7 cm
Length - 5.4 cm



Galena is the natural mineral form of lead sulphide and it is the most important lead ore mineral for commercial lead production. It may also contain around 2% Silver, in which case the Silver content is far more valuable commercially that the Lead. Galena is one of the most abundant and widely distributed sulphide minerals and is found worldwide. It crystallises in the cubic crystal system often showing octahedral forms. It is frequently found associated with sphalerite, calcite and fluorite.

  

  

Sphalerite is a zinc sulphide mineral and occurs in massive, concretionary, granular and botryoidal forms. It’s colour can ranges widely, including shades red, black, brown, yellow, green, grey, white, and sometimes colourless.


 

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