Hydrophane
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
5.5 – 6.5
Specific Gravity
1.98 – 2.5
Refractive Index
1.37 – 1.52
Crystal System
Amorphous
Cleavage
None
Fracture
Conchoidal,Splintery
Color
various
Pleochroism
Absent
Mohs Hardness
| Mohs | Reference mineral | Hydrophane |
|---|---|---|
| 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 Hydrophane
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
Oils and parafins were used to delay the fading of play-of-colour in wet hydrophane. - Opal, Lithographie, 2007, p. 57
5.5 to 6.5Walter Schumann, Gemstones of the world (2001)
1.98 to 2.50Walter Schumann, Gemstones of the world (2001)
BrittleWalter Schumann, Gemstones of the world (2001)
NoneWalter Schumann, Gemstones of the world (2001)
Conchoidal,SplinteryWalter Schumann, Gemstones of the world (2001)
1.37 to 1.52Walter Schumann, Gemstones of the world (2001)
NoneWalter Schumann, Gemstones of the world (2001)
AbsentWalter Schumann, Gemstones of the world (2001)
All colours, play-of-colourWalter Schumann, Gemstones of the world (2001)
Transparent,Translucent,OpaqueWalter Schumann, Gemstones of the world (2001)
AmorphousWalter Schumann, Gemstones of the world (2001)
Kidney- or grape-shaped aggregatesWalter Schumann, Gemstones of the world (2001)
Hydrophane information at mindat.org
About Hydrophane
ハイドロファン（親水オパール）は、多孔質で水を吸収すると透明度が増す特殊なオパールです。乾燥状態では不透明ですが、水に浸すと遊色効果が現れることがあります。エチオピア産の「ウェロオパール」はこの性質を持つことで知られています。この特性は購入前の水浸テストで確認できます。
On this page
Jewelry Use
Durability
4/10
Science FYI Family
Frequently Asked Questions
What is Hydrophane?
ハイドロファン（親水オパール）は、多孔質で水を吸収すると透明度が増す特殊なオパールです。乾燥状態では不透明ですが、水に浸すと遊色効果が現れることがあります。エチオピア産の「ウェロオパール」はこの性質を持つことで知られています。この特性は購入前の水浸テストで確認できます。
What is the hardness of Hydrophane?
Hydrophane has a Mohs hardness of 5.5 to 6.5, making it moderate for use in jewelry.
What color is Hydrophane?
Hydrophane is primarily Various.
How much does Hydrophane cost?
Hydrophane falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Hydrophane?
Hydrophane belongs to the Amorphous crystal system.