Calcite - Axe-head twin
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Moor Farm Quarry, Bonsall Moor, Matlock, Derbyshire, England
1858
Single transparent calcite crystal showing the rare 'Axe-head' twinning. Moor Farm quarry is known for producing a limited number of these twins from a single cavity in 1981 but none since and the quarry is worked out and overgrown. This crystal shows clear 'Axe-head' twinning and is a choice example from the find. Ex. Alan Wardman collection. For more details about the find see Roy Starkey's excellent book Minerals of the English Midlands (published 2018)- Page 75
Formula: CaCO3
Status: Sold
Dimensions: 38x33x21mm
Size: Miniature (M)
Minerals of the English Midlands
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