Olivine

(Mg,Fe)2SiO4

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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.

ระบบผลึก Orthorhombic
หมวดหมู่แร่ธาตุ 09 Silicates
ความแข็งโมห์ส 6.5-7.0
ความถ่วงจำเพาะ 3.22-4.39
สี Green, yellow-green, olive green
ความวาว Vitreous
สีเส้นขูด Colorless
การแตกเรียบ Poor
รอยแตก Conchoidal
ความโปร่งใส Transparent
ลักษณะผลึก Granular, prismatic

ความแข็งโมห์ส

Mohs Hardness: 6.5 – 7.0
1 Soft10 Hard

ระบบผลึก

Orthorhombic

Explore on Science FYI

ChemFYI
Magnesium (Mg) Forsterite end-member (Mg₂SiO₄)
ChemFYI
Iron (Fe) Fayalite end-member (Fe₂SiO₄)
ChemFYI
Silicon (Si) Nesosilicate framework
GemFYI
Peridot Gem-quality forsterite olivine

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.