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Fluorite and Halides

Fluorite

$2,500.00   €2,049  £1,850.00 approx.  

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

ID: CC20930
A 5.5 x 4.5 x 3.0 composite stepped Fluorite crystal leans at an angle on a bed of creamy to pale yellow cubic Fluorite crystals of up to 1 cm on edge. This specimen is from The Bull Vein at Lady Annabella mine, close to the village of Eastgate in Weardale. The composite crystal forms an interpenetrant twin with part of a cubic crystal 3.4 cm on one edge, the latter being somewhat cloudy. The prime crystal is translucent ginger-honey with beautiful delicate lilac bands around all its edges. All stepped faces are crisp and sharp and in LWUV the entire specimen fluoresces bright lilac with white patches and speckles.

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
5.4 × 9.0 × 7.5 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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