Olivine

(Mg,Fe)2SiO4

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A group of magnesium-iron silicates with the formula (Mg,Fe)2SiO4, olivine is abundant in the Earth's mantle and in mafic and ultramafic igneous rocks. It crystallizes in the orthorhombic system in granular or prismatic habits and is transparent with a vitreous luster, a colorless streak, poor cleavage, and a conchoidal fracture. Its green to olive coloration is characteristic, with a Mohs hardness of 6.5 to 7 and a specific gravity from 3.22 to 4.39. Olivine is among the first minerals to crystallize from a cooling basaltic magma, and its gem-quality variety is known as peridot. Its granular habit and conchoidal fracture are typical of a mineral that crystallizes early from magma and weathers readily.

Olivine is a group of silicate minerals common in Earth's mantle and in mafic and ultramafic igneous rocks. The gem variety is called peridot. Olivine is one of the first minerals to crystallize from a cooling basaltic magma.

Kristal Sistemi Orthorhombic
Mineral Sınıfı 09 Silicates
Mohs Sertliği 6.5-7.0
Özgül Ağırlık 3.22-4.39
Renk Green, yellow-green, olive green
Parlaklık Vitreous
Çizgi Rengi Colorless
Dilimlenme Poor
Kırılma Conchoidal
Şeffaflık Transparent
Kristal Alışkanlığı Granular, prismatic

Mohs Sertliği

Mohs Hardness: 6,5 – 7,0
1 Soft10 Hard
Olivine has a Mohs hardness of 6.5–7 on the 1–10 mineral hardness scale.
Mohs Sertliği Reference Mineral
1 Talc
2 Gypsum
3 Calcite
4 Fluorite
5 Apatite
6 Orthoclase
7 Quartz
8 Topaz
9 Corundum
10 Diamond

Kristal Sistemi

Orthorhombic
Olivine crystallizes in the Orthorhombic crystal system.
Özellik Value
Kristal Sistemi Orthorhombic
Axial Relationships a ≠ b ≠ c, α = β = γ = 90°

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Frequently Asked Questions

What is the hardness of Olivine?
Olivine has a Mohs hardness of 6.5-7.0.
What crystal system does Olivine belong to?
Olivine crystallizes in the Orthorhombic crystal system.
What color is Olivine?
Olivine is typically Green, yellow-green, olive green.
What type of luster does Olivine have?
Olivine exhibits a Vitreous luster.
What is the chemical formula of Olivine?
The chemical formula of Olivine is (Mg,Fe)2SiO4.