59^€

Chrysoprase ornamental stone from Madagascar

Weight 1.15 kg

CHARACTERISTICS
Weight	1150 gr. 1.15 kg
Size	max 14 cm 140x95x60 mm
Reference	211106496
Mineral	variety of mineral Chrysoprase
Category	Decoration stones
Group	Free forms
Country	Madagascar

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Formula SiO₂] CHRYSOPRASE
O	Oxygen	Other no metal	53.26%
Si	Silicon	Metalloids	46.74%
			100%
Chrysoprase is a variety of chalcedony, a microcrystalline form of quartz. It is distinguished by its characteristic green color, ranging from apple green to emerald green. This hue is due to the presence of nickel oxide within its structure. Nickel, by replacing some of the silicon atoms in the crystal lattice, creates colored centers that absorb certain wavelengths of light, giving the stone its green color. Chrysoprase typically forms in cavities in metamorphic rocks, where hydrothermal solutions rich in silica and nickel circulate. As these solutions cool, the silica precipitates and traps nickel ions, giving rise to chrysoprase. The quality and color of chrysoprase can vary depending on the deposit and the conditions of formation. Chrysoprase has a hardness of 6.5 to 7 on the Mohs scale, making it a relatively hard and durable stone. It has a vitreous luster and varies in transparency, from transparent to translucent. It is used for making cabochons, beads, and inlays in various art objects.

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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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