Hexagonal-Trigonal System
Cochise College                                                                                        
Geology Home Page  
MINERALS and CRYSTALS                    

Crystals and Crystal Models    

Roger Weller, geology instructor 
( wellerr@cochise.edu )
last edited:  3/22/18    number of photos:  73


aquamarine crystal
 
illustrations
Illustrations from Manual of Mineralogy and Petrology,                               
by James D. Dana, 1889:  1  2  3  4  5  6  7  8 
also visit:

Textbook of Systematic Mineralogy
by Hilary Bauerman, 1881, 362 pages
   IV.  Hexagonal System- page 73
 
wooden crystal models                                               
model 84-hexagonal dipyramid:  1  2  3  4
model 85- dihexagonal pyramid:  1  2  3
model 86-hexagonal prism with base:  1
model 87-12-sided prism and basal pinacoid:  1  2 
model 89-6-sided prism and dipyramid:  1  2  3
model 98-rhombohedron:  1  2
model 99:  1  2  3
model 100-scalendohedron:  1  2  3  4  5  6
model 105:  1  2  3  4
model 109-modified rhombohedron:  1  2
model 114-tourmaline type prism:  1  2
model 130:  1  2

molecular structure models
models of calcite crystalline structure:  1  2  3  4 
models of graphite crystalline structure:  1  2  3  4 

crystals of minerals                                      
hexagonal dipyramid
     quartz:  1 
     corundum:  1
hexagonal prism and basal pinacoid
     beryl (aquamarine):  1  2  3  4  5
     corundum (ruby):  1  2  3
     vanadinite:  1  2  3 
     pyromorphite:  1
rhombohedron
     calcite:  1  2  3  4
     chabazite:  1
     dolomite:  1
     rhodochrosite:  1

     siderite:  1
rhombohedron and prism
     calcite:  1
     quartz:  1  2  3  4
scalendohedron
     calcite:  1  2  3  4  5

Photos are copyright free for non-commercial educational uses. 
Just credit photos to R.Weller/Cochise College.
copyright 2018-R.Weller