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Id 62
Identification Type Mineral
Name Apatite
Distinguishing Features Prismatic
Moderate-relief
Colorless
Transparent
Description Usually transparent colorless. Nonpleochroic. Weak birefringence (white-gray). Prismatic, six-sided crystals may be euhedral or subhedral. Moderate relief. May occur as either detrital grains (derived from felsic igneous rocks) or authigenic/diagenetic crystals in phosphate-rich environments.
Tags low-birefringence
anisotropic
euhedral
phosphate
heavy-mineral
External Resources Apatite on MinDat
Imposters
Images
Unique Identification: Apatite
Site name: Jones
Light type: Plane-Polarized Light
Magnification: 400.0
Submitted by: Mark Shapley
Notes: occurrence in Mazama tephra, euhedral volcanic
Image Tags: none
Unique Identification: Apatite
Site name: Jones
Light type: Cross-Polarized Light
Magnification: 400.0
Submitted by: Mark Shapley
Notes: occurrence in Mazama tephra, euhedral volcanic
Image Tags: none
Unique Identification: Apatite
Site name: Lake Malawi
Light type: Plane-Polarized Light
Magnification: not specified
Submitted by: Andy Breckenridge
Notes: apatite, euhedral, diagenesis, from light colored lamina of varve
Image Tags: none
Unique Identification: Apatite
Site name: Lake Malawi
Light type: Cross-Polarized Light
Magnification: not specified
Submitted by: Andy Breckenridge
Notes: apatite, euhedral, diagenesis, from light colored lamina of varve
Image Tags: none