Danburite

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In 1839 American mineralogist Charles Upham Shephard discovered a clear, bright, colorless gemstone in Danbury, Connecticut, and named it danburite after the location. Unfortunately for danburite, it was discovered at a time when colored gemstones were heavily promoted and highly desired. This colorless find, therefore, didn't create much excitement at that time. Danburite, which belongs to a class of minerals known as silicates, remained relatively unknown for years, but is steadily growing in popularity today.

Danburite Polished
Danburite Classification
Common Name Danburite
Species Danburite
Danburite Optical Properties
Transparency Transparent - Translucent
Dispersion Strength: Weak Fire Value: 0.016
Refractive Index 1.630-1.636
Tolerance:(+0.003/-0.003)
Birefringence 0.006
Optic Character Biaxial
Optic Sign Positive or Negative
Polariscope Reaction Doubly Refractive (DR)
Fluorescence SWUV: inert to weaker, light blue to blue-green
LWUV: inert to strong, light blue to blue-green
Pleochroism Dichroic, unobservable or weak, varying shades of body color
Danburite Characteristic Physical Properties
Hardness 7
Streak White
Specific Gravity 2.970-3.030 Typical:3.000
Toughness Good
Inclusions Danburite might have natural inclusions, fingerprints and parallel growth tubes.
Luster Vitreous, Greasy
Fracture Uneven, Subconchoidal
Cleavage None
Danburite Chemistry & Crystallography
Chemical Name calcium boron silicate
Chemical Formula CaB2(SiO4)2
Crystal System Orthorhombic
Chemistry Classification Silicate

Danburite Colors

  • Blue Danburite Blue
  • White Danburite White
  • Pink Danburite Pink

Countries of Origin

Tanzania, United Republic Of; Russian Federation (the); Brazil; Mexico

History

Danburite is named for the area in which it was discovered, but we wish it had been named for its beauty.The always gentle, never intense, shades of pink, yellow and brown have a compelling beauty. When well-polished, its surface gleams. Additionally, a CVD coating can be applied to deliver a bright-pink look. This adds another danburite color option! Discovered in 1839 in Danbury, Connecticut, this mineral has a hardness rating of 7 on the Mohs scale. That means it is very wearable and ideal for jewelry. It is often found in crystals of significant size, which is appealing to collectors, jewelry designers and jewelry lovers. Additionally, high-quality danburite is found with excellent clarity and transparency; it seldom needs to be enhanced in any way.

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More About Danburite

Although a relative newcomer on the gemstone scene, Danburite has, nonetheless, its own folkloric appeal. It is said by some to facilitate deep change and the ability to leave the past behind. Some people believe it can promote rest, clear dreams, and stimulate the heart chakra. They believe that it can connect the heart to the mind and the mind to the heart. We have no real scientific evidence that danburite does all these things, but we do know that it is so pretty, it will almost certainly make a person smile.

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Tim Matthews

Author

Tim Matthews

Tim Matthews is President and Chief Executive Officer of Jewelry Television® (JTV), as well as a member of the company's Board of Directors. He oversees and leads all aspects of the company's powerful omni-digital retail platform that uniquely specializes in fine jewelry and gemstones. His passion for business and gemstones has led him to become a recognized expert in the field of gemology. He is a life member of the Gemmological Association of Great Britain (Gem-A) and has earned Gem-A's highest degrees, the Gemmology (FGA) and Diamond (DGA) diplomas. He is also a Graduate Gemologist (GG) of the Gemological Institute of America (GIA) and has also completed GIA's Graduate Diplomas in Diamonds, Colored Stones and Pearls. Under his leadership, JTV has become the leader in the sourcing and selling of color gemstones and jewelry.

This page was created on June 27, 2014.

This page was last edited on October 24, 2019.