PURPLE FLUORITE CELESTINE
A large specimen of rare Purple Fluorite Celestine. An all Celestine matrix, aesthetically displayed and very collectible. Great location too. This is a heavy piece for its size due to the strontium content of the Celestine. Strontium is what makes fireworks glow red.
Musquiz, Coahuila, Mexico.
10cm x 11cm x 9.5cm, 644g.
Calcium Fluoride: CaF2.
Named in 1797 by Carlo Antonio Galeani Napione. Latin, fluere is 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. Fluorite is one of those delightful minerals that comes in a wide range of colours, including many colours all in one piece, or Rainbow Fluorite. A staple for the mineral collection.
Strontium Sulfate: SrSO4.
Celestite is the new name for Celestine and is a favorite among mineral collectors. Its sky blue (or celestial) color is very pretty and is unique in the mineral kingdom. Celestite also forms with other colorful minerals, making very nice combinations. Blue Celestite with bright yellow sulfur is one of the most famous colorful combinations of minerals.
Celestite has the same structure as Barite (BaSO4), and forms very similar crystals. The two may seem identical by ordinary methods, but a flame test can distinguish them. By scraping the dust of the crystals into a gas flame, the color of the flame will confirm the identity of the crystal. If the flame is a pale green, it is Barite, but if the flame is red, it is Celestite. The flame test works because the elements Barium (Ba) and Strontium (Sr) react with the flame and produce those colors. Normally Barite is not blue, but many specimens of blue Barite are often misidentified as celestite. The nice crystals, good luster and attractive blue color make fine specimens of celestite an outstanding mineral for someone’s cabinet or display case.