Andesine
A variety of Albite
What is Andesine?
Andesine is a silicate mineral, a member of the plagioclase feldspar solid solution series. Its chemical formula is (Ca, Na)(Al, Si)4O8, where Ca/(Ca + Na) (% anorthite) is between 30–50%. The formula may be written as Na0.7-0.5Ca0.3-0.5Al1.3-1.5Si2.7-2.5O8. The plagioclase feldspars are a continuous solid solution series and as such the accurate identification of individual members requires detailed optical study, chemical analysis or density measurements. Refractive indices and specific gravity increase directly with calcium content. It is sometimes used as a gemstone.
Healing Properties
Andesine is believed to improve memory and cognitive thinking skills. It works with the Crown chakra to stimulate the brain and provide for better clarity and focus. Many use it during meditation to release energy from the Third Eye chakra and help them understand dreams or visions. Can be worn, carried, or placed in the home or workplace.
Optical Properties
- Refractive Index
- 1.543-1.564
- Birefringence
- 0.007-0.011
- Optical Character
- Biaxial positive or negative
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Andesine Localities Map
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The Meaning
Deriving its name from the lava of the Andes mountains in South America, andesine is thought to be a sister mineral to sunstone. Containing the essence of a goddess, folklore claims it has a nurturing and protective aura. Andesine has been used traditionally to magically erase negative thoughts and make way for a clear mind.
Key Characteristics
Formation of Andesine
Andesine occurs in intermediate igneous rocks such as diorite, syenite and andesite. It characteristically occurs in metamorphic rocks of granulite to amphibolite facies commonly exhibiting antiperthite texture. It also occurs as detrital grains in sedimentary rocks. It is commonly associated with quartz, potassium feldspar, biotite, hornblende and magnetite.
Quick Facts
Physical Properties
- Color
- White, gray, green, yellow, flesh-red
- Streak
- White
Chemical Properties
- Chemical Formula
- (Na,Ca)[Al(Si,Al)Si2O8]
- Elements
- Al, Na, O, Si
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