Diopside
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Spanning a striking range of forms, diopside is a calcium magnesium pyroxene that appears as vivid chrome diopside from Siberia, a rare cat's-eye variety, and a four-rayed star diopside from India whose asterism resembles a silver cross on dark green. Transparent colorless to pale green crystals are faceted as affordable gems, while deep green chrome diopside rivals emerald for color intensity. It crystallizes in the monoclinic system and measures 5.0 to 6.0 on the Mohs scale, a modest hardness best suited to protected settings. This budget-tier semi-precious stone occurs in metamorphic and basic igneous rocks worldwide.
Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
5.0 – 6.0
Specific Gravity
3.22 – 3.4
Refractive Index
1.664 – 1.73
Crystal System
Monoclinic
Luster
Vitreous
Cleavage
Good
Fracture
Uneven
Color
various
Birefringence
0.024
Dispersion
0.017
Pleochroism
Common trichroism: light green - yellow green - dark green
Mohs Hardness
| Mohs | Reference mineral | Diopside |
|---|---|---|
| 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
Budget (< $50/ct)
Where to Buy Diopside
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 Diopside
透辉石是一种钙镁辉石族矿物，在宝石界以多种颜色变体著称。最受欢迎的是含铬的深绿色变体（铬透辉石），颜色鲜艳，常与祖母绿相媲美。星光透辉石因含针状金红石包裹体而呈现四射星光效应，极为迷人。此外，黑色透辉石也常见于市场。透辉石主要产自俄罗斯西伯利亚、印度、巴基斯坦和意大利，是珠宝界颇具价值的宝石品种。
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Jewelry Use
Durability
4/10
Science FYI Family
Frequently Asked Questions
What is Diopside?
透辉石是一种钙镁辉石族矿物，在宝石界以多种颜色变体著称。最受欢迎的是含铬的深绿色变体（铬透辉石），颜色鲜艳，常与祖母绿相媲美。星光透辉石因含针状金红石包裹体而呈现四射星光效应，极为迷人。此外，黑色透辉石也常见于市场。透辉石主要产自俄罗斯西伯利亚、印度、巴基斯坦和意大利，是珠宝界颇具价值的宝石品种。
What is the hardness of Diopside?
Diopside has a Mohs hardness of 5.0 to 6.0, making it moderate for use in jewelry.
What color is Diopside?
Diopside is primarily Various.
How much does Diopside cost?
Diopside falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Diopside?
Diopside belongs to the Monoclinic crystal system.