Origin
Southern and central Africa
USA, Mexico, Brazil, Switzerland, Sri Lanka, Burma, Madagascar, Color: colorless, light yellow, light pink, Hardness: 7, Refractive index: 1.63 1.64, Density: 2.98 3.03, Chemical composition: Ca(B2Si2O8), Crystal structure: orthorhombic, Origins: USA, Mexico, Brazil, Germany, Switzerland, Sri Lanka, Burma, Madagascar, Japan. Colorless danburites are common, with light pink or yellowish stones being more rare and expensive. Only eye clean pieces are valuable.
Color
White, Colorless, Blue, Red, Green, Yellow, Violet
Yellow, Brown, Colorless, White, gray, Brownish, Yellow
Streak
Not Available
White
For which Rashi?
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Planet
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Element of Planets
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Finger
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Ring Metal
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Energy
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Deities
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Not to wear with
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Powers
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Planetary
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Talisman
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Tenacity
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Brittle
Solubility
Not Available
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Durability
Not Available
Not Available
Specific Gravity
1.98-2.50
2.97-3.03
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001)
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle
Cleavage
Not Available
{001} Poor
Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Not Available
Vitreous, Greasy
Pleochroism
AbsentWalter Schumann
Weak: pale yellow yellow
Transparency
Translucent
Gemmological Tables (2004) More from other references
Refractive Index
1.37-1.52
1.627-1.639
Optic Character
Not Available
Biaxial/+
Crystal System
Not Available
Orthorhombic
Birefringence
Not Available
0.006
Clarity
Translucent
TransparentUlrich Henn and Claudio C. Milisenda
Neurological
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Cardiovascular
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Respiratory
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Reproductive
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Digestive
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Psychology
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Healing
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Qualities Associated
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Common Opal Vs Danburite Fracture
Fracture is an important parameter when you compare Common Opal and Danburite Physical Properties. It is necessary to understand the significance of these properties, before you compare Common Opal Vs Danburite fracture. Whenever a gemstone chip breaks, it leaves a characteristic line along its breakage. Such lines are known as fracture and are used to identify the gemstones in their initial stages of production when they are in the form of rough minerals. Fracture is usually described with the terms “fibrous” and “splintery” to denote a fracture that usually leaves elongated and sharp edges. Fracture observed in Common Opal is Conchoidal, Conchoidal and Gemstones of the world (2001). Danburite fracture is Brittle, Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Uneven and Uneven.
Common Opal Vs Danburite Luster
A primary knowledge about Common Opal vs Danburite luster is useful in apparent identifications of these gemstones. Luster is the measure of light that gets reflected when incident on a finished cut gemstone. There are two major types of lusters: Silky and Adamantine. Since luster varies between two crystals of even the same gemstone, luster is limited to basic identification criteria. Danburite, on other hand, exhibits Greasy and Vitreous luster.