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Calcite (Butterfly-Twins) from Eyam, North Derbyshire, England

 
Calcite (Butterfly-Twins) from Eyam, North Derbyshire, England

DESCRIPTION:No. 16005
Mineral:Calcite (Butterfly-Twins)
Locality:Eyam, North Derbyshire, England
Description:Translucent calcite crystals twinned along the {1011} plane (Butterfly-Twin). Several lines of silver ink on the crystals are evidence these were used for studying crystallography. Ex. J. Cilen collection #9528
Overall Size:23x21x13 mm
Crystals:20 mm
Status: Sold - Posted here for reference only
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