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GEOLOGISTS' ASSOCIATION
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2024 CALENDAR

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POTATO-STONE - Wells, Somerset

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Home > MINERALS > MINERALS FROM BRITAIN AND IRELAND FOR COLLECTORS > SOUTH WEST ENGLAND


‘POTATO-STONE’
  
A geode lined with quartz crystals                
 

Dulcote Quarry, near Wells, Somerset

The Mendip Hills area has yielded some beautiful quartz geodes. They occur as nodules in the red, marly clays overlying the Carboniferous Limestone. These clays were laid down in an arid, tidal-flat environment during the Triassic period (200 million years ago) when Britain was situated in the tropics.
 
These geodes are known as a 'potato-stones' due to their external appearance.
  
This small example contains sparkling quartz crystals and black crystals of goethite.
 
Click on a picture for a larger image

Size:  approx. 7 x 6 x 5 centimetres
Weight:  190 grams

PRICE: £14.00