Sard
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
6.5 – 7.0
Specific Gravity
2.58 – 2.63
Refractive Index
1.535 – 1.539
Crystal System
Trigonal
Luster
Waxy,Resinous
Cleavage
None
Fracture
Conchoidal
Color
various
Birefringence
0.008
Pleochroism
Absent
Mohs Hardness
| Mohs | Reference mineral | Sard |
|---|---|---|
| 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 Sard
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.
Treatments
The color may be lightened by heat-treatment - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 7
6.5 to 7Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
2.58 to 2.63Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
NoneWalter Schumann, Gemstones of the world (2001)
ConchoidalArthur Thomas, Gemstones (2009)
1.535 to 1.539Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Uniaxial/+Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
0.008 to 0.010Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
AbsentWalter Schumann, Gemstones of the world (2001)
NoneWalter Schumann, Gemstones of the world (2001)
BrownUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references
Translucent,OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Waxy,ResinousArthur Thomas, Gemstones (2009)
TrigonalUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Fibrous to grained aggregateUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Sard information at mindat.org
About Sard
肉红玉髓是玉髓（微晶石英）的红棕色至红橙色品种，与光线更鲜艳的红玉髓密切相关。自古代美索不达米亚、埃及和希腊起便被广泛用于制作印章、护身符和珠宝，巴西、印度和乌拉圭是主要产地。肉红玉髓常与纹带缟玛瑙配合使用，制成精美的浮雕。
On this page
Jewelry Use
Durability
6/10
Science FYI Family
Frequently Asked Questions
What is Sard?
肉红玉髓是玉髓（微晶石英）的红棕色至红橙色品种，与光线更鲜艳的红玉髓密切相关。自古代美索不达米亚、埃及和希腊起便被广泛用于制作印章、护身符和珠宝，巴西、印度和乌拉圭是主要产地。肉红玉髓常与纹带缟玛瑙配合使用，制成精美的浮雕。
What is the hardness of Sard?
Sard has a Mohs hardness of 6.5 to 7.0, making it moderate for use in jewelry.
What color is Sard?
Sard is primarily Various.
How much does Sard cost?
Sard falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Sard?
Sard belongs to the Trigonal crystal system.