Cymophane
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
8,5
Specific Gravity
3,69 – 3,81
Refractive Index
1,739 – 1,77
Crystal System
Orthorhombic
Luster
Vitreous
Color
various
Birefringence
0,007
Mohs Hardness
| Mohs | Reference mineral | Cymophane |
|---|---|---|
| 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
Fine ($500-5,000/ct)
Where to Buy Cymophane
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
Irradiation of light variety produces dark (olive)-brown color: may be radioactive. - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 3
Cat's eye quartz, cat's eye tourmaline, bleached tiger's eye quartz, glass. - GIA 2019
In 1987 Japan's Kyocera Corporation created commercially-available synthetic cat's eye color-change alexandrite, which is a rare combination. - GIA 2019
8.5Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
3.69 to 3.81Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
1.739 to 1.770+Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Biaxial/+,-Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
0.007 to 0.013Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Bluish (or yellowish according to other sources) chatoyancyGemdat.org, Management Team (2012)
Yellow, greenHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Transparent,TranslucentMichael O?Donoghue, Gems, Sixth Edition (2006)
VitreousMichael O?Donoghue, Gems, Sixth Edition (2006)
OrthorhombicHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Microscopic tube-like cavities or needle-like inclusions of rutile in an orientation parallel to the c-axis - mindat.org
Cymophane information at mindat.org
Sri Lanka
About Cymophane
A cymophane, também conhecida como olho-de-gato, é a variedade de crisoberilo que exibe o fenómeno chatoyant de olho-de-gato quando cortada em cabuchão. A inclusão de fibras de rutilo paralelas cria uma faixa de luz brilhante que se move sobre a superfície, evocando o olho de um felino. O Sri Lanka produz os exemplares mais finos, e o efeito de olho-de-gato deve ser vivo, bem definido e centrado. É uma das pedras preciosas mais características e valorizadas.
On this page
Jewelry Use
Durability
9/10
Suitable for daily wear
Science FYI Family
Frequently Asked Questions
What is Cymophane?
A cymophane, também conhecida como olho-de-gato, é a variedade de crisoberilo que exibe o fenómeno chatoyant de olho-de-gato quando cortada em cabuchão. A inclusão de fibras de rutilo paralelas cria uma faixa de luz brilhante que se move sobre a superfície, evocando o olho de um felino. O Sri Lanka
What is the hardness of Cymophane?
Cymophane has a Mohs hardness of 8.5, making it excellent for use in jewelry.
What color is Cymophane?
Cymophane is primarily Various.
How much does Cymophane cost?
Cymophane falls into the Fine ($500-5,000/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Cymophane?
Cymophane belongs to the Orthorhombic crystal system.