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Id 28
Identification Type Mineral
Name Orthopyroxene
Distinguishing Features Subhedral
Description Transparent colorless to green or brown. May be pleochroic from pale red to greenish (hypersthene). Low birefringence. Appear as stubby prisms and subhedral to anhedral crystals. Near-90 degree perfect cleavage. Moderately high relief.
Tags Ferromagnesian
pleochroic
silicate
transparent
brown
green
good-cleavage
moderately-high-relief
External Resources Orthopyroxene on MinDat
Imposters
Images
Unique Identification: Orthopyroxene
Site name: Round Lake
Light type: Plane-Polarized Light
Magnification: not specified
Submitted by: not specified
Notes: none
Image Tags: pleochroic silicate pyroxene
Unique Identification: Orthopyroxene
Site name: Round Lake
Light type: Plane-Polarized Light
Magnification: not specified
Submitted by: not specified
Notes: none
Image Tags: pleochroic silicate pyroxene
Unique Identification: Orthopyroxene
Site name: Round Lake
Light type: Plane-Polarized Light
Magnification: not specified
Submitted by: not specified
Notes: none
Image Tags: pleochroic silicate pyroxene
Unique Identification: Orthopyroxene
Site name: Round Lake
Light type: Cross-Polarized Light
Magnification: not specified
Submitted by: not specified
Notes: none
Image Tags: pleochroic silicate pyroxene
Unique Identification: Orthopyroxene
Site name: Yellowstone
Light type: Plane-Polarized Light
Magnification: 630
Submitted by: Val Stanley
Notes: vivid orange in color in this case
Image Tags: orange pleochroic cleavage silicate pyroxene
Unique Identification: Orthopyroxene
Site name: Yellowstone
Light type: Cross-Polarized Light
Magnification: 630
Submitted by: Val Stanley
Notes: none
Image Tags: cleavage moderately birefringent silicate pyroxene