Edenite
A variety of Edenite Root Name Group
What is Edenite?
Edenite is a double chain silicate mineral of the amphibole group with the general chemical composition NaCa2Mg5(Si7Al)O22(OH)2. Edenite is named for the locality of Edenville, Orange County, New York, where it was first described.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Edenite 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.
Edenite Localities Map
See where Edenite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Characteristics of Edenite
Edenite is a biaxial positive mineral. When viewed in thin section with a petrographic microscope, it is white-gray with pale green pleochorism in plane-polarized light. Under crossed polars, its interference colors range from first order gray to first order blue.
Formation of Edenite
Edenite has been found primarily in metamorphic rocks, occurring in pods of other magnesium rich minerals within a marble formation or with garnet rich lherzolites from deep within the Earth's crust. Thus, finding edenite in the field can indicate high temperature regional metamorphism of the surrounding rocks.
Quick Facts
Physical Properties
- Color
- White, grey, pale to dark green, also brown and pale pinkish-brown
- Hardness (Mohs)
- 5 - 6
- Streak
- White
Chemical Properties
- Chemical Formula
- {Na}{Ca2}{Mg5}(AlSi7O22)(OH)2 The minerals in the edenite group is defined with A(Na+K+2Ca)≥0.5 apfu and C(Al+Fe3++2Ti)≤0.5 apfu and with (OH), F or Cl in the W position. Edenite is defined with A position: Na dominant C position: Mg dominant W position: (OH) dominant
- Elements
- Al, Ca, H, Mg, Na, O, Si
Also Known As
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Edenite FAQs
How do I identify Edenite?
Edenite can be identified by its hardness of 5 - 6 on the Mohs scale, White color. Look for these key characteristics when examining specimens.
What color is Edenite?
Edenite typically appears in White, grey, pale to dark green, also brown and pale pinkish-brown. Color can vary depending on impurities and formation conditions.
How hard is Edenite?
Edenite has a hardness of 5 - 6 on the Mohs scale. This gives it moderate hardness.
What is the characteristics of edenite of Edenite?
Edenite is a biaxial positive mineral. When viewed in thin section with a petrographic microscope, it is white-gray with pale green pleochorism in plane-polarized light. Under crossed polars, its interference colors range from first order gray to first order blue.
What is the formation of edenite of Edenite?
Edenite has been found primarily in metamorphic rocks, occurring in pods of other magnesium rich minerals within a marble formation or with garnet rich lherzolites from deep within the Earth's crust. Thus, finding edenite in the field can indicate high temperature regional metamorphism of the surrounding rocks.