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Dominant species
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Hornblende
Chemical
Formula
Ca2(Mg, Fe, Al)5 (Al, Si)8O22(OH)2
Species
Silicates
Crystal
System
Monoclinic
Mohs
Scale
6
Specific
Gravity
2.9
Color
Black/dark green
Streak
Pale gray, gray-white[1][2]
Luster
Vitreous to dull
Cleavage
Imperfect at 56 and 124 degrees
Fracture
Uneven
Crystal Habit:Hexagonal/granular
Hornblende5485
Hornblende5485
Hornblende5480
Hornblende5480
Hornblende5476
Hornblende5476
Hornblende5468
Hornblende5468
Hornblende5464
Hornblende5464
Hornblende5460
Hornblende5460
Hornblende5456
Hornblende5456
Hornblende5449
Hornblende5449
Hornblende5444
Hornblende5444
Hornblende5439
Hornblende5439
Hornblende5436
Hornblende5436
Hornblende5372
Hornblende5372
Hornblende5365
Hornblende5365
Hornblende5361
Hornblende5361
Hornblende5356
Hornblende5356
Hornblende5350
Hornblende5350
Hornblende5348
Hornblende5348
Hornblende5343
Hornblende5343
Hornblende5340
Hornblende5340
Hornblende5334
Hornblende5334
Hornblende5331
Hornblende5331
Hornblende5328
Hornblende5328