TCD44XXX: Floating group of cubic Fluorite crystals, very complete and with no noticeable damage. Particularly noteworthy are their bluish-green colour and the remarkable transparency of many of the crystals, with bright and well-defined faces.
This is an old specimen, from July 1997, which belonged to George J. Wilson and was later acquired by Harry Critchley.
A particularly attractive feature of the specimen is its intense fluorescence, accompanied by a marked colour change, perceptible even under different daylight conditions, a characteristic highly appreciated in Fluorites from this locality.

Geologically, these Fluorites crystallized from fluorine-rich hydrothermal fluids that circulated through fractures developed in the Carboniferous limestones of Weardale.
Eastgate Quarry (Blue Circle Cement Quarry), Diana pocket, Eastgate, Stanhope, Weardale, North Pennines Orefield, County Durham  England / United Kingdom (07/1997)

Specimen size: 9.2 × 6.7 × 3.9 cm = 3.62” × 2.64” × 1.54”

Main crystal size: 2.4 × 1.7 cm = 0.94” × 0.67”