Hexagonal-Trigonal System
Cochise College
Virtual Geology Museum
Hall of Minerals
Crystals and Crystal Models
Hexagonal-Trigonal System
Roger Weller,
geology instructor (
wellerr@cochise.edu
)
last edited: 10/25/10 number of
photos: 73
illustrations
Illustrations from Manual of Mineralogy and
Petrology,
by James D. Dana, 1889:
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8
wooden crystal models
model 84-hexagonal dipyramid:
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4
model 85- dihexagonal pyramid:
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3
model 86-hexagonal prism with base:
1
model 87-12-sided prism and basal pinacoid:
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2
model 89-6-sided prism and dipyramid:
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3
model 98-rhombohedron:
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2
model 99:
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model 100-scalendohedron:
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model 105:
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model 109-modified rhombohedron:
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2
model 114-tourmaline type prism:
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2
model 130:
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2
molecular structure models
models of
calcite crystalline structure:
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4
models of graphite crystalline
structure:
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4
crystals of minerals
hexagonal dipyramid
quartz:
1
corundum:
1
hexagonal prism and basal pinacoid
beryl (aquamarine):
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5
corundum (ruby):
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3
vanadinite:
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3
pyromorphite:
1
rhombohedron
calcite:
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4
chabazite:
1
dolomite:
1
rhodochrosite:
1
siderite:
1
rhombohedron and
prism
calcite:
1
quartz:
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4
scalendohedron
calcite:
1
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4
5
Photos are copyright free for non-commercial
educational uses.
Just credit photos to R.Weller/Cochise College.
copyright 2010-R.Weller