|Dimensions (mm)||not provided|
|Weight (carats)||not provided|
COLOUR CHANGE FLUORITE
This is natural Fluorite gem that shows a mild colour change. The colour changes from optium blue in daylight to purple in incandescaent light.
Weight 2.23 cts app
Size 8.5 x 8.5 x 5 mm app
Fluorite (also called fluorspar) is a halide mineral composed of calcium fluoride, . It is an isometric mineral with a cubic habit, though octahedral and more complex isometric forms are not uncommon. Crystal twinning is common and adds complexity to the observed crystal habits.
In 1852 fluorite gave its name to the phenomenon of fluorescence, which is prominent in fluorites from certain locations, due to certain impurities in the crystal. Fluorite also gave the name to its constitutive element fluorine.
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|Ends||14th Dec 2016 3:00pm PST|
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