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, 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.
  
Canada, Russia
  
Color
Yellow, Brown, Colorless, White, gray, Brownish, Yellow
  
Brown, Yellow, Greenish, Brown, Yellow, Greenish, Brown, Brownish, Red, Yellow
  
Streak
White
  
Brown, White, Brown, White
  
For which Rashi?
Not Available
  
Not Available
  
Planet
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Element of Planets
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How to Wear?
  
  
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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Birthstone
  
  
Planetary
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Talisman
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Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
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Durability
Not Available
  
Not Available
  
Specific Gravity
2.97-3.03
  
3.2-3.4
  
Fracture
Uneven, 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]
  
Mohs Hardness
7
  
3
  
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
  
Dispersion
Not Available
  
Transparency
Gemmological Tables (2004) More from other references
  
Translucent
  
Refractive Index
1.627-1.639
  
1.678-1.758
  
Optic Character
Biaxial/+
  
Not Available
  
Crystal System
Orthorhombic
  
Triclinic
  
Birefringence
0.006
  
0.050
  
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
  
Translucent
  
Physical
  
  
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 Brittle, Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Uneven and Uneven. Astrophyllite fracture is Brittle, Metallic and Uneven.
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 Greasy and Vitreous luster. Astrophyllite, on other hand, exhibits Greasy and Pearly luster.