SMALL ROGERLEY MINE FLUORITE CLUSTER
A Small Rogerley Mine Fluorite Cluster from Weardale. We have held the price down on this one so it is very affordable and can be tucked away into your collection for safe keeping. The cluster has two prominent crystals. This particular specimen is not as daylight fluorescent as most but still has colour change. Grab a piece of geological history now and spend hours admiring the amazing cubic form and fluorescent properties of this great English mineral specimen. Like we do! We have stocked this incredible green Fluorite since we first started dealing minerals many moons ago. We stock a range of pieces from different pockets at the mine. The mine has now closed down and pieces like this are already rising in value.
Rogerley Mine, County Durham, England.
3.2cm x 3.3cm x 2.1cm, 28g.
CaF2 Calcium Fluoride.
Named in 1797 by Carlo Antonio Galeani Napione from the Latin, fluere “to flow” (for its use as a flux). The term fluorescence is derived from fluorite, which will often markedly exhibit this effect. The element fluorine also derives its name from fluorite, a major source for the element. Daylight fluorescence is suspected to be caused by the inclusion of Rare Earth Elements (REE), minerals including phosphates (monazite and xenotime) and fluorocarbonates (mainly synchysite). Fluorite from the Rogerley Mine is highly sought after for its daylight fluorescence and the top quality crystals it forms.
Fluorite is found as a common gangue mineral in hydrothermal veins, especially those containing lead and zinc minerals. It is also found in some greisens, granites, pegmatites and high-temperature veins, and as a component of some marbles and other metamorphic rocks.
Check out more Fluorescent Specimens here.