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Description |
Dark gray limestone with a layer of banded, massive, Quartz, is host to large lustrous and translucent crystals of Fluorite, to 4 cm across. Individual crystals exhibit both a rich emerald green at the core and gemmy purple even in daylight (from the slight UV rays they catch and fluoresce to). In addition, the crystals clearly show off penetration twinning.
This specimen features comes from the last pocket
found in the digging season of 2007. |
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Locality |
Rogerly Mine, Frosterly, County Durham, England |
