Olivine: Olivine has got the chemical formula (Mg, Fe)2[SiO4] and so it is a silicate. It has got a hardness of 6.5 to 7 and it crystallizes in the rhombical system. The density is between 3.27 g/cm3 and 4.20 g/cm3 and the reason for this big difference is that the parts of magnesium and iron differ. Other names for olivine are peridot and chrysolite. Olivine is green. In nature olivine can be found in form of crystals or in form of irregular pieces. The crystals are often wide and short. Mostly olivine is transparent. Jewels are made of good olivines. Olivines can be found in Burma, in Egypt, in Brazil, in the Czech Republic and on the Canary Islands.

Data about Olivine

Chemical formula (Mg, Fe)2[SiO4]

Mineral class silicates

Crystal system rhombical

Hardness 6.5 to 7

Density 3.27 g/cm3 to 4.20 g/cm3

Color green

Line color white

Gloss glass gloss

Break shell

Fissileness good

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