The danburite often presents the phenomena of fluorescence, luminescence and thermoluminescence. It is a relatively rare mineral.
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Danburite
- Translations : Danburiet, Danburiitti, Danburit, Danburyte, Danburita, Данбурит, 赛黄晶
- Synonym : Bementite
- Etymology : Name in reference to its locality of discovery: Danbury in Connecticut the USA.
- Discovery: 1839 by C.U. Shepard
- Type localityDanbury, Connecticut, USA
Gemological data
- Chemical formula : Ca2(Fe,Mg,Mn)Al2(OH.BO3.Si4O12)
- Hardness (Mohs) : 7 - 7.5
- Density : 2.93 - 3.02
- Refractive index : nα = 1.627 - 1.633 nβ = 1.630 - 1.636 nγ = 1.633 - 1.639
- Birefingence : -0.010
- Crystal system : Orthorhombique
- Group : Silicates
- Mineralogical Class : Sorosilicates
The gallery
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