To learn more about the mineralogy of the adularia, see Mindat.ord
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Adularia
- Etymology : From the greek "Adula"
- Discovery: 1780 by Ermenegildo Pini
- Type localityAdula, it is the ancient Latin name of Mont Saint Gothard in Switzerland.
Gemological data
- Chemical formula : KAlSi3O8
- Hardness (Mohs) : 6 - 6.5
- Density : 2.56 - 2.628
- Refractive index : 1,518 - 1,539
- Birefingence : -0,008
- Crystal system : Monoclinic
- Group : Feldspars - Tectosilicates
- Mineralogical Class : Silicates
