Agate slice pendant with butterfly engraving.

Agate slice pendant with butterfly engraving.

Agate pendant with

Agate pendant with "laser engraving" zodiac sign.

"Always fits" 3 row ring with the rare & 100% natural Peridot also called Olivine.

Very nice ring that fits everyone, beautiful design, suitable for smaller stones such as Peridot occurs in nature.
Availability: In stock
SKU
11961
  • Buy 10 for €4.99 each and save 17%
The mineral olivine (Peridot) is a nesosilicate with the chemical formula (Mg,Fe)2SiO4, where the terminal members between magnesium and iron are formed by the mineral series forsterite (rich in Mg) and fayalite (rich in Fe). Olivine has an orthorhombic crystal system and it crystallizes in a slightly flattened shape but can also occur in solid or granular form. It breaks conchoidally and is somewhat fragile. The hardness of olivine is between 6.5 and 7. The average density is 3.32 kg/l and the mineral has a glass luster. Usually it has an olive green color (hence the name) but it can also be reddish due to the oxidation of trivalent iron. It is transparent to translucent. Olivine occurs as a rock-forming mineral in mafic igneous rocks and in certain metamorphic rocks. It has also been discovered in meteorites and has been tracked on Mars by the US space probe Mars Odyssey. The Mars Exploration Rovers have further confirmed its presence. Olivine is formed in magma that is rich in magnesium and low in silicates (silicon dioxide). It is an important mineral in rocks such as gabbro, norite, the mantle rock peridotite (dunite) and as small crystals in basalt. The metamorphism of impure dolomite or other sedimentary rocks high in magnesium and low in silicates has also been found to form olivine. Olivine is a widely used means for facade cleaning. Small olivine grains are blasted onto the wall together with water, so that the contaminated layer is removed. Olivine is better suited for this than ordinary sand grains, due to its greater hardness. Because there is currently an intensive search all over the world for cheap processes to bind CO2 to minerals, olivine has gained attention. Olivine is a basic rock. It reacts relatively quickly with the (acidic) CO2 in the atmosphere. As a result, crushed olivine weathers completely in a few years, depending on the grain size. To bind (neutralize) the CO2 produced by 1 liter of petroleum during combustion, slightly less than 1 liter of olivine is needed. The reaction is exothermic. The final products of the reaction are, depending on the composition of the olivine, magnesium carbonate or silica (sand)
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Dimensions One size fits all.
Country of Manufacture Brazil
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