Andradite
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
6.5 – 7.0
Specific Gravity
3.7 – 4.1
Refractive Index
1.88 – 1.94
Crystal System
Isometric
Luster
Subadamantine,Vitreous
Cleavage
None
Fracture
Conchoidal
Color
various
Dispersion
0.057
Mohs Hardness
| Mohs | Reference mineral | Andradite |
|---|---|---|
| 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 Andradite
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 Andradite
アンドラダイトは、ダイヤモンドを超える高い分散度を持つことで知られるカルシウム鉄ガーネット種で、鮮やかなスペクトル光彩を放ちます。緑色のデマントイド・黒色のメラナイト・黄色のトパゾライトの三変種があり、特にデマントイドはガーネット類中で最も高価な宝石の一つとして珍重されます。ロシアのウラル産が最高品質とされています。
On this page
Jewelry Use
Durability
6/10
Science FYI Family
Frequently Asked Questions
What is Andradite?
アンドラダイトは、ダイヤモンドを超える高い分散度を持つことで知られるカルシウム鉄ガーネット種で、鮮やかなスペクトル光彩を放ちます。緑色のデマントイド・黒色のメラナイト・黄色のトパゾライトの三変種があり、特にデマントイドはガーネット類中で最も高価な宝石の一つとして珍重されます。ロシアのウラル産が最高品質とされています。
What is the hardness of Andradite?
Andradite has a Mohs hardness of 6.5 to 7.0, making it moderate for use in jewelry.
What color is Andradite?
Andradite is primarily Various.
How much does Andradite cost?
Andradite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Andradite?
Andradite belongs to the Isometric crystal system.