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Hajar | all galleries >> Palaeogalleries >> Published Specimens > Fluorite twin, 65 mm, hexoctahedral and shallow tetrahexahedral faces are seen. Boltsburn Mine, Weardale, Co Durham.
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17-NOV-2013

Fluorite twin, 65 mm, hexoctahedral and shallow tetrahexahedral faces are seen. Boltsburn Mine, Weardale, Co Durham.

Published (Figure 6) in The Mineralogical Record, volume 52, March-April 2021. Smith & Holtkamp, Twinning in Fluorite Crystals.

Sony Alpha 77
1/20s f/10.0 at 75.0mm iso200 hide exif
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Date/Time17-Nov-2013 11:44:31
MakeSony
ModelSLT-A77V
Flash UsedNo
Focal Length75 mm
Exposure Time1/20 sec
Aperturef/10
ISO Equivalent200
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