Danburite is a usually-colorless mineral with a hardness and appearance quite similar to quartz. Relatively rare, it is not often found outside Danbury, Connecticut, where it was first discovered and for which it is named. Occasionally, exceptional danburites are cut and polished into gemstones.
Hardness:
7 - 7.5
Density:
2.99 g/cm³
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Properties
Values
Characteristics
Cultural
Common Questions
General Info About Danburite
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Physical Properties of Danburite
Luster
Greasy, Vitreous
Diaphaneity
Transparent to translucent
Colors
Pale yellow, yellowish-brown, colourless
Magnetism
Non-magnetic
Tenacity
Brittle
Cleavage
Indistinct
Fracture
Uneven, Subconchoidal
Streak
White
Crystal System
Orthorhombic
Hardness
7 - 7.5 , Extremely hard
Density
2.99 g/cm³, Normal Weight
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Chemical Properties of Danburite
Chemical Classification
Silicates
Formula
CaB2Si2O8
Elements listed
B, Ca, O, Si
Common Impurities
Fe, Mn, Al, Mg, Sr, Na
Optical Properties of Danburite
Refractive Index
1.627-1.639
Birefringence
0.006
Pleochroism
Weak: pale yellow, yellow
Dispersion
0.017
Optical Character
Biaxial positive or negative
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Rarity
Rare
Characteristics of Danburite
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Characteristics of Danburite
It has a Mohs hardness of 7 to 7.5 and a specific gravity of 3.0. The mineral has an orthorhombic crystal form. It is usually colourless, like quartz, but can also be either pale yellow or yellowish-brown. It typically occurs in contact metamorphic rocks.
The Dana classification of minerals categorizes danburite as a sorosilicate, while the Strunz classification scheme lists it as a tectosilicate; its structure can be interpreted as either.
Its crystal symmetry and form are similar to topaz; however, topaz is a calcium fluorine bearing nesosilicate.
Cultural Significance of Danburite
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Uses of Danburite
The clarity, resilience, and strong dispersion of danburite make it valuable as cut stones for jewelry.
Etymology of Danburite
It is named for Danbury, Connecticut, United States, where it was first discovered in 1839 by Charles Upham Shephard.
Healing Properties of Danburite
Danburite is believed to posses a high level of spiritual energy and aid in enlightenment. Linking the Heart and Crown chakras, the stone is said to improve cognitive thinking and open the heart to greater joy. This uplifting of the spirit is said to heighten awareness and provide greater understanding and acceptance.
Chakras
Heart, Third Eye, Crown
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