Forsterite
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
6.5 – 7.0
Specific Gravity
3.23 – 3.26
Refractive Index
1.635 – 1.671
Crystal System
Orthorhombic
Cleavage
Imperfect
Fracture
Conchoidal
Color
various
Birefringence
0.034
Pleochroism
tanzanite
Fluorescence
tanzanite
Mohs Hardness
| Mohs | Reference mineral | Forsterite |
|---|---|---|
| 1 | Talc | |
| 2 | Gypsum | |
| 3 | Calcite | |
| 4 | Fluorite | |
| 5 | Apatite | |
| 6 | Orthoclase | |
| 7 | Quartz | ● |
| 8 | Topaz | |
| 9 | Corundum | |
| 10 | Diamond |
Crystal System
Value & Market
Price Tier
Moderate ($50-500/ct)
Where to Buy Forsterite
Blue Nile
Fine jewelry retailer
James Allen
Gemstone jewelry
Brilliant Earth
Ethically sourced gems
Amazon
Wide selection
Links may earn a commission at no extra cost to you.
About Forsterite
フォルステライトは、マグネシウムカンラン石（Mg₂SiO₄）で、ペリドット（オリビン）グループのマグネシウム端成分です。無色から淡黄緑色を示し、透明な宝石質の標本はファセットカットされます。マグネシウム含有量が多いほど淡い色になります。スリランカやパキスタンが主要産地です。
On this page
Jewelry Use
Durability
6/10
Science FYI Family
Frequently Asked Questions
What is Forsterite?
フォルステライトは、マグネシウムカンラン石（Mg₂SiO₄）で、ペリドット（オリビン）グループのマグネシウム端成分です。無色から淡黄緑色を示し、透明な宝石質の標本はファセットカットされます。マグネシウム含有量が多いほど淡い色になります。スリランカやパキスタンが主要産地です。
What is the hardness of Forsterite?
Forsterite has a Mohs hardness of 6.5 to 7.0, making it moderate for use in jewelry.
What color is Forsterite?
Forsterite is primarily Various.
How much does Forsterite cost?
Forsterite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Forsterite?
Forsterite belongs to the Orthorhombic crystal system.