• Fluorite
  • Fluorite
Fluorite and Halides

Fluorite

$1,500.00   €1,230  £1,110.00 approx.  

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

ID: CC20924
A delightful intergrown cluster of rich acidic lemon-yellow Fluorite crystals from The Bull Vein at Lady Annabella mine, close to the village of Eastgate in Weardale. The initial specimen recovery season at this mine concentrated within the bounds of The Bull Vein, one of several sub-vertical mineralised veins which cross the former Eastgate quarry. Although these beautiful crystals cannot be described a gemmy, they certainly contain many gemmy zones which are interspersed throughout crystals pervaded with reflective planes within the crystal lattice. Contained within the group are Fluorite crystals measuring 3.0 x 2.7 x 2.5 cm and 1.6 x 1.5 x 1.3 cm, all with sharp edges and glassy, yet with a slightly greasy to waxy lustre, with some faces displaying concentric tetrahexahedral growth patterns, but not actually of this morphology. Under LWUV the entire specimen fluoresces a bright lilac-white, although the crystal edges emit a brighter lavender-white framework which nicely delineates the overall morphology.

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
4.1 × 6.0 × 4.9 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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