• Fluorite
Fluorite and Halides

Fluorite

$500.00   €410  £370.00 approx.  

This specimen is priced in US dollars, all other prices are approximate.

ID: CC20915
A 7.5 cm rib of transparent lemon-yellow Fluorite crystals form a beautiful, elongated miniature from The Bull Vein at Lady Annabella mine in Weardale. Cubic and elongated-cubic crystals of rich lemon Fluorite to 1.6 cm on edge cover a thin rib of iron-rich altered limestone, with the Fluorite forming gemmy crystals which often have cloudy lemon-cream centres. Under LWUV the entire specimen fluoresces bright white with mottled purple patches.

The Lady Annabella mine began specimen recovery operations in July 2020 within the former Eastgate Quarry, previously known as the Blue Circle Cement Quarry. This quarry began in the early 1960s, working an exposure of the Great Limestone, a major formation of Carboniferous age (Pendleian Substage), found across much of Northern England. Following uplift and fracturing, subsequent Fluorite mineralisation pervaded this area of County Durham, in the form of sub-vertical veins and near-horizontal metasomatic flats. Metasomatism is the chemical alteration of rock by hydrothermal fluids. Over the past 55 years, Fluorite from this quarry has become famous amongst collectors for its wide range of colours, colour variations and zonation. In just its first five months of operation, the Lady Annabella mine has produced a magnificent range of Fluorite specimens, many of which are colour variants and mixtures never before seen at this locality, nor even in the other famous mines throughout the Weardale Valley.

Details

Dimensions
7.5 × 2.8 × 2.5 cm
Categories
Fluorite and Halides, Latest Additions
Locality
The Bull Vein, Lady Annabella Mine, Eastgate, Weardale, County Durham, England, Europe

Minerals on Specimen

Minerals on specimen
Fluorite

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