English
Etymology
:Named for the type locality at Adular, Switzerland.
Noun
adularia (plural: adularias)
- adulariaA variety of orthoclase feldspar found as colorless to white prismatic crystals in cavities in metamorphic rocks. Some specimens reflect a bluish sheen along crystal faces. This phenomenon is called adularescence, and adularia with this property is called moonstone. (See sanidine).
Chemical composition: Potassium aluminum silicate, <math>KAlSi?_3O_8</math>
Physical properties:
*Moh's Hardness: 6.0
*Specific gravity: 2.6
*Color: white, colorless
*Luster: glassy
*Fracture: conchoidal
*Habit: prismatic.
Related terms
:See Rock, Mineral, Gemstone
Translations
mid
Spanish: adularia f
fr:adularia
vi:adularia
zh:adularia
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