Fluorite with Aragonite (OFX-0024)

specimen number:
9273247

location:
Diana Maria Mine, Weardale, Co. Durham, England, UK

description:

Gorgeous emerald green glassy gemmy cubic crystals of twinned of fluorite measuring to 1.6 cm on edge across the top of matrix and mostly coated with white aragonite. In super condition with great color contrast.

The Diana Maria Mine, located in Weardale, County Durham, England, is a modern underground mining operation established in 2017 that focuses entirely on the recovery of mineral specimens. Geologically, the mine exploits the Sutcliffe Vein and associated flat-lying replacement deposits within the Carboniferous-aged Great Limestone formation, part of the broader Northern Pennine Orefield. Mineralization formed via hydrothermal processes where metal-bearing fluids circulated through fractures and reactive carbonate host rocks, depositing fluorite along with accessory quartz and sulfides. The mine has achieved international acclaim among mineral collectors for producing sharp, vibrant green cubic fluorite crystals that are celebrated for their remarkable daylight fluorescence, shifting from a rich green indoors to a strong purple or blue-green appearance in natural sunlight.

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