Origin
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, Germany, Japan. Colorless danburites are common, with light pink or yellowish stones being more rare and expensive. Only eye clean pieces are valuable.
Canada, Russia
Color
Yellow, Brown, Colorless, White, gray, Brownish
Brown, Yellow, Greenish, Brownish, Red
Streak
White
Brown, White
For which Rashi?
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Planet
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Element of Planets
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Energy
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Finger
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Ring Metal
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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
Brittle
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Solubility
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Durability
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Specific Gravity
2.97-3.03
3.2-3.4
Fracture
Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle
Uneven, Brittle, Metallic
Cleavage
{001} Poor
Perfect on [001] imperfect on [100]
Chemical Composition
CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Luster
Vitreous, Greasy
Greasy, Pearly
Pleochroism
Weak: pale yellow yellow
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
Transparency
Gemmological Tables (2004) More from other references
Translucent
Refractive Index
1.627-1.639
1.678-1.758
Optic Character
Biaxial/+
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Crystal System
Orthorhombic
Triclinic
Birefringence
0.006
0.050
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Translucent
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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Danburite Vs Astrophyllite Fracture
Fracture is an important parameter when you compare Danburite and Astrophyllite Physical Properties. It is necessary to understand the significance of these properties, before you compare Danburite Vs Astrophyllite 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 Danburite is Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal and Brittle. Astrophyllite fracture is Uneven, Brittle and Metallic.
Danburite Vs Astrophyllite Luster
A primary knowledge about Danburite vs Astrophyllite 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 exhibits Vitreous and Greasy luster. Astrophyllite, on other hand, exhibits Greasy and Pearly luster.