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Fluorite

$600.00   €488  £440.00 approx.  

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

ID: CC20916
This fabulous yellow, blue and colourless zoned elongated crystal epitomises why Fluorite from The Bull Vein at Lady Annabella mine is so sought after by collectors. Although the back, rough half of this crystal is cloudy opaque white, most of the Fluorite is perfectly transparent and gemmy. It is a beautiful “Eastgate” lemon-yellow and with an outer, perfectly formed geometric rim of near colourless Fluorite which forms a very noticeable framework-rim. Although under magnification there appears to be no other colour at the lemon-colourless interface, when viewed unaided there appears a darker, pencil-thin line which hints of blue. Under LWUV the crystal’s outer edges fluoresce bright lavender, forming an outline framework within which the faces emit a deep lilac fluorescence. It is beautiful and a great example from The Bull Vein.

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
3.0 × 3.2 × 1.9 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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