Rogerley Fluorite with Intricate Growth Patterns and Twinned Crystals 42.53g

An interesting Rogerley fluorite specimen with an elongated, interlocking crystal formation and striking chevron-like growth patterns across its broad faces. Fine parallel striations cover much of the surface, while a distinct white mineralized seam cuts diagonally through the deep green crystals, giving this piece plenty of character.

The crystals appear dark green indoors but develop blue-green tones in natural daylight due to their daylight fluorescence. Under a longwave UV flashlight, the fluorite fluoresces bright blue.

Locality: Rogerley Mine, Frosterley, Weardale, Durham, England
Weight: 42.53 grams
Dimensions: 43 x 32 x 28 mm
Crystal System: Isometric (Cubic)
Mineral Class: Halides