Fig. 291 - Dana sets of wooden crystal models3D ModelNoAI
Fig. 291 - Dana sets of wooden crystal models
35
35 Views
1Like
Triangles: 84
Vertices: 44
More model informationIII. Hexagonal system
B. Rhombohedral division
2. Ditrigonal-Pyramidal class - 3m
Figure 291. Trigonal prisms {10-10} {01-10}, second-order prism {11-20}, positive trigonal pyramids {10-11} {02-21}, negative trigonal pyramids {01-1-1} {10-1-2} - Tourmaline
Dana sets of wooden crystal models, arranged by the late Professor William E. Ford to illustrate Dana’s Textbook of Mineralogy 4th edition (1932), originally produced by Dr. Krantz Rheinisches Mineralien-Kontor (Bonn).
Website: http://geology.uaic.ro/muzee/mineralogie/
Concept & 3D-modelling by Andrei Ionut APOPEI
Comments