Natural peridotite raw mineral rock teaching samples

 Prduct Knowledge 

Olivine, mostly because of the color of olive green and the name. Its English name for Peridot or Olivine, the former directly from the French Peridot, the latter mineralogy noun.

Olivine is about 3500 years ago in ancient Egypt, found on the island territory of St. John's. Gem-quality peridot is divided into thick yellow-green peridot, golden green peridot, yellow-green peridot, dark green olivine (also known as the West dusk emerald or emerald, emerald evening primrose) and day gem (produced in the meteorite In very rare). Quality transparent olivine olive green or yellow-green, clear and beautiful color is very pleasing, a symbol of peace, happiness, serenity and other good intentions. Some of the ancient tribal wars often occur between olivine to give each represent peace. In some temple in Jerusalem, since there are thousands of years ago mosaic olivine.

Peridot is an island structure silicate mineral, chemical formula (Mg, Fe) 2 [Sio4], belongs to orthorhombic. Often has a short columnar crystal form, mostly irregular granular aggregate. Color, mostly olive green, green, golden green or emerald green. Shiny glass, transparent. Refractive index 1.654-1.690, birefringence 0.035-0.038. Multicolor is not obvious, the dispersion 0.020. Hardness 6.5-7.0, density 3.27 - 3.48 g / cc. A brittle, toughness is poor, prone to cracks.

Olivine composed mainly completely isomorphous Mg2Sio4 and Fe2Sio4 by the two end-member component mixed crystal formation. A member of the rich iron sometimes a small amount of Ca2 + and Mn2 + replacement which Fe2 + and the members of rich magnesium may have a small amount of Cr3 + and Ni2 + replacement which Mg2 + in addition may also contain trace amounts of Fe3 +, Zn2 + and so on.

It is one of the main components of the mineral olivine mantle rocks. Earth's crust and mantle material relating to a variety of discharge or intrusive mafic, ultramafic rocks are rich in olivine.

The contact metamorphism and regional metamorphism process, magnesium carbonate rock metamorphism is generated due to olivine. Metamorphic iron deposits and dolomitic limestone, entirely composed of olivine. Also constitutes one of the main mineral olivine stone meteorites.

Olivine-free quartz, and therefore can not be born in granite.

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