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5 Chapter 5Figure 5.1 Individual crystal habits: A. equant, B. tabular, C. platy, D. pr...Figure 5.2 Crystal aggregate habits, clockwise from upper left: top row: fib...Figure 5.3 Crystal aggregate habits (left to right); top row: massive kaolin...Figure 5.4 Crystals with various percentages of bounding crystal faces. From...Figure 5.5 Types of cleavage exhibited by minerals.Figure 5.6 Examples of mineral cleavage (left to right). Top row: one set of...Figure 5.7 Fracture types, clockwise from upper left: conchoidal fracture in...Figure 5.8 Examples of mineral diaphaneity, top‐down. Left column: opaque mi...Figure 5.9 General relationships between light transmission (diaphaneity), l...Figure 5.10 Metallic and related lusters (opaque and nearly opaque minerals)...Figure 5.11 Nonmetallic lusters (nonopaque minerals) left to right; top row:...Figure 5.12 Clockwise from upper left: asterism in the “Star of India” sapph...Figure 5.13 Basic nesosilicate (orthosilicate) structure with isolated tetra...Figure 5.14 Basic unit of sorosilicate structure; pairs of silica tetrahedra...Figure 5.15 Triangular, square, and hexagonal ring structures in cyclosilica...Figure 5.16 Single‐chain inosilicate structure in pyroxene.Figure 5.17 Double‐chain silicate structure in amphiboles.Figure 5.18 Two‐dimensional sheet structure typical of phyllosilicate minera...Figure 5.19 (a) Two‐layer (t‐o or t‐b) structure of serpentine. (b) Three‐la...Figure 5.20 Three‐dimensional framework structures typical of tectosilicates...