Fluorite with Quartz - image 1
Fluorite with Quartz - image 2
specimen video
Updated 5d ago
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Fluorite with Quartz
This wonderful French Fluorite specimen is full of intrigue. It is from Marsanges mine in Haute-Loire, Auvergne-Rhône-Alpes, which was one of the largest producers of industrial Fluorite in France, eventually closing in 1977. Despite 930,000 tons of Fluorite being sold (obviously not as specimens), it is not often that specimens are seen from this mine. As a thin cabinet-sized plate of vein Quartz featuring several teal-blue Fluorite crystals it looks quite showy and attractive. However, the intrigue lies with the paragenetic history of how it formed. The thin Quartz plate shows many dark brown patches, usually surrounded by raised areas of slightly more coarsely crystallized white glassy Quartz. The Fluorite cubes are also 'socketed' into areas of the same crystallized Quartz, some of which coats the Fluorite slightly. So there appears to be at least two generations, or phases, of Quartz with Fluorite growth inbetween, but at the same time, another unknown mineral with equant crystals grew, but has since dissolved away, leaving behind casts, or epimorphs. Even without its geological history it is an attractive specimen and can be mounted upright as a lovely display piece. Of all the specimens of Fluorite I have seen from this mine, this is one of just a few with this lovely teal-blue colour, most being colourless.
$1,750.00
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Product details
SizeCabinet
Dimensions13.0 x 11.4 x 3.8 cm
SKUCC44804
Listed on04/05/2025
Known provenance
Unknown dateNot disclosed
Species and Locality Wiki Pages
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