Simpsonite
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
7.0 – 7.5
Specific Gravity
5.9 – 7.3
Refractive Index
1.994 – 2.04
Crystal System
Trigonal
Cleavage
Indistinct
Fracture
Conchoidal
Color
various
Birefringence
0.046
Pleochroism
Nil
Mohs Hardness
| Mohs | Reference mineral | Simpsonite |
|---|---|---|
| 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 Simpsonite
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 Simpsonite
辛普森石是一种极为罕见的铝钽酸盐矿物，形成淡黄色至淡绿色的扁六方形晶体，由于折射率高且透明度好，偶尔被切割成宝石供收藏。主要产自澳大利亚西澳大利亚州的伟晶岩矿床，是少数含钽的宝石矿物之一，深受罕见矿物收藏家青睐。
On this page
Jewelry Use
Durability
7/10
Suitable for daily wear
Science FYI Family
Frequently Asked Questions
What is Simpsonite?
辛普森石是一种极为罕见的铝钽酸盐矿物，形成淡黄色至淡绿色的扁六方形晶体，由于折射率高且透明度好，偶尔被切割成宝石供收藏。主要产自澳大利亚西澳大利亚州的伟晶岩矿床，是少数含钽的宝石矿物之一，深受罕见矿物收藏家青睐。
What is the hardness of Simpsonite?
Simpsonite has a Mohs hardness of 7.0 to 7.5, making it excellent for use in jewelry.
What color is Simpsonite?
Simpsonite is primarily Various.
How much does Simpsonite cost?
Simpsonite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Simpsonite?
Simpsonite belongs to the Trigonal crystal system.