Sardonyx
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
6.5 – 7.0
Specific Gravity
2.55 – 2.7
Refractive Index
1.53 – 1.543
Crystal System
Trigonal
Luster
Waxy
Color
black
Birefringence
0.008
Mohs Hardness
| Mohs | Reference mineral | Sardonyx |
|---|---|---|
| 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 Sardonyx
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 Sardonyx
红纹石（缟玛瑙）是一种带状玉髓，由交替的肉红玉髓（红棕色）和缟玛瑙（白色或黑色）层叠而成，自古以来便是浮雕和印章的首选材料。这种鲜明的色带使其成为浮雕和印章的理想材料，古罗马将领会将战神玛尔斯的形象雕刻于其上以祈求庇佑。印度、巴西和乌拉圭是主要产地。
On this page
Jewelry Use
Durability
6/10
Science FYI Family
Frequently Asked Questions
What is Sardonyx?
红纹石（缟玛瑙）是一种带状玉髓，由交替的肉红玉髓（红棕色）和缟玛瑙（白色或黑色）层叠而成，自古以来便是浮雕和印章的首选材料。这种鲜明的色带使其成为浮雕和印章的理想材料，古罗马将领会将战神玛尔斯的形象雕刻于其上以祈求庇佑。印度、巴西和乌拉圭是主要产地。
What is the hardness of Sardonyx?
Sardonyx has a Mohs hardness of 6.5 to 7.0, making it moderate for use in jewelry.
What color is Sardonyx?
Sardonyx is primarily Black.
How much does Sardonyx cost?
Sardonyx falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Sardonyx?
Sardonyx belongs to the Trigonal crystal system.