Earth Sciences
Collections

Epidote

UNB-2017-0031Minerals » Silicates » Sorosilicates

Description

Yellowish-green granular sample of Epidote with a vitreous lustre. Epidote (Ca2Al2FeOSiO4O7(OH)) can be yellowish green to brownish black in colour with a vitreous lustre. Streak is colourless or grey and hardness is 6 to 7. Cleavage is perfect lengthwise. Epidote is usually found as long, slender, grooved prismatic crystals that are terminated usually by two sloping faces. Epidote can also be thick tabular crystals, massive, columnar, divergent, acicular or granular.

Specifications

Object nameEpidote
IDUNB-2017-0031
Legal statusPermanent collection
CategoryMineral
Classification
Mineral group:
Silicates
Sub-group:
Sorosilicates
Composition
  • Ca2(Al,Fe)3(SiO4)3(OH)
  • (Al,Fe)SiO4
  • Ca2Al3(SiO4)3(OH)
  • Ca2Al3(SiO4)3(OH)
OriginUnknown
Pieces1
PartialNo
Measurements
  • 3cm x 5.5cm x 3.5cm

Publications

  • Chesterman, C.W. 1979. Audubon Society, Field Guide to North American Rocks and Minerals. Knopf.