Danburite
Query URLs
https://term.museum-digital.de/md-de/tag/11576
- Note
- Danburite is a calcium boron silicate mineral with a chemical formula of CaB2(SiO4)2.
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. The clarity, resilience, and strong dispersion of danburite make it valuable as cut stones for jewelry.
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Danburit und Quarz auf Sphalerit
Von Calcitkriställchen...
Object information
Image: Museum für Naturkunde Magdeburg - CC BY-NC-SA -
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Danburit
Néhány mm hosszú, fehér,...
Object information
Image: Herman Ottó Múzeum, Miskolc - CC BY-NC-SA -
Danburit
Max. 2 cm-es fehér oszlopos...
Object information
Image: Herman Ottó Múzeum, Miskolc - CC BY-NC-SA -
Danburit
0,5-1 cm-es fehér tűs-sugaras...
Object information
Image: Herman Ottó Múzeum, Miskolc - CC BY-NC-SA
References
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