Edenite Locality: Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA Size: 2 x 1 cm Copyright © Christopher O’Neill

Chemical Formula: NaCa2Mg5(Si7Al)O22(OH)2
Locality: Edenville, Orange County, New York, USA.
Name Origin: Named for the locality.
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.

Physical Properties

Cleavage: {110} Perfect, {010} Distinct
Color: Bluish green, Colorless, Gray, White, Light green.
Density: 3 – 3.059, Average = 3.02
Diaphaneity: Transparent to translucent
Fracture: Brittle – Conchoidal – Very brittle fracture producing small, conchoidal fragments.
Habit: Tabular – Form dimensions are thin in one direction.
Hardness: 6 – Orthoclase
Luminescence: Fluorescent, Short UV=pale green-blue.
Luster: Vitreous (Glassy)
Streak: white


Monmouth Township, Haliburton Co., Ontario, Canada © John Sobolewksi
Edenite Locality: Renfrew area, Renfrew Co., Ontario, Canada RRUFF Project Specimen ID: R060029 Copyright © Rruff Project
Edenite Locality: Edenite type locality, Edenite Hill, Edenville, Town of Warwick, Orange Co., New York, USA Dimensions: 6.3 cm x 5.2 cm x 4.1 cm Copyright © Weinrich Minerals, Inc.