Alstonite

Origin: Hexham, Northumberland, England

Owner: Lou Perloff

Microscopic image

 

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Photo-Atlas of Minerals

7 mm crystal

Origin: Brownley Hill (Bloomsberry) Mine, Nenthead, Alston Moor District, North Pennines, Cumbria, England, UK

Owner: Steve Rust

 

Photo courtesy of: 

Steve Rust

 

  

 

  

Alstonite on barite rich matrix

Origin: Brownley Hill mine, Nenthead, Cumbria, England

Sample size: 15 x 25 x 15 mm,  sharp scalenohedral colourless crystals of alstonite to 2 mm in length (top), 6.5 x 4 x 3.2 cm (bottom)

 

Photo courtesy of: 

Dan Weinrich

Dealer in fine mineral specimens

 

  

This specimen of fluorite has exposed vugs lined with myriad crystals of alstonite. The largest is about 2 mm in length. Most are 1 mm or less however.

   

Alstonite on calcite

Origin: Minerva #1 Mine, Hardin Co., Illinois, United States

Sample size: 3.7 x 2.7 x 1.8 cm (top/2nd row), 7.4 x 6.3 x 3.7 cm (3rd/bottom row)

 

     

  

This specimen consists of spikes of strontianite up to 2.5 cm long. On one side, there is purple fluorite completely covered with needles of alstonite up to 0.2 cm long.

Origin: Annabel Lee Mine, Cave-in-Rock area, Hardin County, Illinois, U.S.A.

Sample size: 6.4 x 5.4 x 4.1 cm

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Origin: Brownley Hill mine, Nenthead, Cumbria, England (type locality)

Sample size: 7 x 5 x 2.5 cm

 

  

White scalenohedral crystals to 1 mm

Origin: Fallowfield mine,Tyne Valley, Northumberland, England

Sample size: 3 x 1.5 x 2.5cm

 

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Origin:  Rosebery Mine, Rosebery, Tasmania, Australia

Sample size: crystals are up to 3 mm long

Sample owner: Steve Sorrell

 

 

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