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Semi Precious Stone Olivine



The mineral olivine is an orthosilicate of magnesium with the formula (Mg,Fe)2SiO4, in which the ratio of magnesium and iron is found to vary between the 2 end members of forsterite[?] (Mg-rich) and Fayalite [?] (Fe-rich). Olivine crystallizes in the orthorhombic system in somewhat flattened forms but may occur massive or granular. It has a concordat fracture and is rather brittle. The hardness of olivine is 6.5-7, its specific gravity is 3.27-3.37 and it has a vitreous luster. It is usually colored olive-green (hence the name), though it may be reddish from the oxidation of iron. It is transparent to translucent. Olivine occurs in both igneous rocks as a primary mineral and in certain metamorphic rocks, and has also been discovered in meteorites.


Olivine

Historical Facts of Olivine



Refractive index: 1.630 – 1.650, 1.650 – 1.670, 1.670 – 1.690



Chemical Composition: (Mg, Fe)2SiO4



Mohs Scale Hardness: 6.5 – 7



Density: 3.27 – 3.37



Crystal system: Orthorhombic



Luster: Vitreous



Color: Yellow to yellow-green



Gem Jewelry Olivine



Bracelet
Olivine Bracelet
Earring
Olivine Earring
Necklace
Olivine Necklace
Ring
Olivine Ring

NOVEMBER BIRTHSTONE - CITRINE


Citrine Gemstone

COMMEMORATIVE EVENT - 13th Anniversary
KEYWORDS - Success, Abundance, Personal Power
ALSO KNOWN AS - Merchant's stone, Success stone
COLORS - Pale yellow to brown
OCCURRENCE - Brazil
COLOR ZONING - Tiger stripes or Zebra stripes

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