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Id 138
Identification Type Mineral
Name Pyroxene
Distinguishing Features
Description
Tags silicate
External Resources
Imposters
Images
Unique Identification: Pyroxene
Site name: Bay Horse Lake, ID
Light type: Cross-Polarized Light
Magnification: 400.0
Submitted by: Mark Shapley
Notes: Large dark-colored magmatic pyroxene grain from a basaltic tephra originating in the Snake River Plain, Idaho. First-and-second-order birefringence is obscured by strong grain coloration.
Image Tags: pyroxene mafic-mineral moderate-birefringence prismatic ferromagnesian
Unique Identification: Pyroxene
Site name: Bay Horse Lake, ID
Light type: Plane-Polarized Light
Magnification: 400.0
Submitted by: Mark Shapley
Notes: Large dark-colored magmatic pyroxene grain from a basaltic tephra originating in the Snake River Plain, Idaho. Fragmentary plant matter underlies the grain.
Image Tags: pyroxene mafic-mineral moderate-birefringence prismatic ferromagnesian
Unique Identification: Pyroxene
Site name: Lake of the Woods
Light type: Plane-Polarized Light
Magnification: 400.0
Submitted by: Val Stanley
Notes: 90 degree cleavages
Image Tags: green high-relief perpendicular-cleavage
Unique Identification: Pyroxene
Site name: Lake of the Woods
Light type: Cross-Polarized Light
Magnification: 400.0
Submitted by: Val Stanley
Notes: 90 degree cleavages
Image Tags: high-relief perpendicular-cleavage