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
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Andesine before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Andesine Localities Map
See where Andesine is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
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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Andesine FAQs
How do I identify Andesine?
Andesine can be identified by its White color. Look for these key characteristics when examining specimens.
What color is Andesine?
Andesine typically appears in White, gray, green, yellow, flesh-red. Color can vary depending on impurities and formation conditions.
What is the formation of andesine 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.
