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Fluorite

$300.00   €244  £220.00 approx.  

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

ID: CC20934
This specimen is from The Bull Vein at Lady Annabella mine, close to the village of Eastgate in Weardale. This impressive part-crystal, measuring 4.3 cm on its remaining edges, forms two separate interpenetrant twins with two much smaller crystals, 2.1 cm and 1.6 cm on edge. Most faces of the cube are missing due to the lack of in-situ accommodation space, so preventing the crystal from fully developing. However, it is a stunning acidic deep lemon-yellow and incredibly gemmy, reminiscent of similarly intensely coloured Fluorites from the famous Hilton mine in not-too-distant Scordale. Under LWUV the crystal outer edges fluoresce lavender-white, forming an outlining framework and within which the faces are mid-lilac.

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
5.1 × 6.2 × 4.5 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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