9^€

Green prehnite

Weight 70 gr

CHARACTERISTICS
Weight	70 gr
Size	45x40x25 mm
Reference	200402666
Mineral	mineral species Prehnite
Category	Rocks and minerals
Group	Raw rocks
Country	Congo - kinshasa

Contractual photos showing the object you will receive when ordering. the photos were taken in order to obtain the most faithful possible rendering of the object.
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Formula Ca₂Al(AlSi₃O₁₀)(OH)₂] PREHNITE
O	Oxygen	Other no metal	44.51%
Si	Silicon	Metalloids	21.31%
Ca	Calcium	Alkaline earth metal	20.27%
Al	Aluminum	Poor metal	13.65%
H	Hydrogen	Other no metal	0.25%
			99.99%
The mineral Prehnite is a calcium aluminum silicate. It usually appears as pale green to yellow crystals, although its color can vary depending on its exact chemical composition. Prehnite is the first mineral to be named and described in South Africa, and it is notable for being one of the first minerals to crystallize during low-grade metamorphism. It has a hardness of 6 to 6.5 on the Mohs scale, which makes it relatively resistant to erosion and wear. It is generally translucent, with a glassy to pearly sheen. Prehnite is often used as an ornamental stone because of its beautiful color and shine.

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Once the package is supported by the postal service, delivery times are those announced by the Post (letter followed or Colissimo followed). Parcel shipping from France.

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