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Blue celestite crystals - Madagascar - 200803487

95
mm
550
gr
Reference
200803487

Size mm
95x80x60
Category
Geodes and druses

Country
Madagascar
Mineral species
Celestine

Collection
164 - August 2020
Translate to :

Celestine, also called celestite, is a very abundant mineral species composed of strontium and sulfur. Its name comes from the Greek coelestis meaning Celeste. The Celestine is also known under the name of stone of the Angels. Celestine is formed by filling with hydrothermal strontium solutions, holes in volcanic rocks. It is also found in dolomites, limestones or even in sandstones. These crystals often have the shape of an elongated prism, sometimes of tablets. The main deposits are located in Germany, Austria, the USA, Canada, Italy and Madagascar.

Characteristics :

Density 3.90
Hardness 3.00 à 3.50
Group Sulfate
Formula SrSO4
Cleavage {001} parfait, {210} bon
Break Fragile
Chemical composition :

Sr Strontium Alkaline earth metal 47.7%
O Oxygen Other no metal 34.84%
S Sulfur Other no metal 17.45%
100%
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