Acknowledgements, 1. Introduction, 2. Key to rock-forming minerals in thin-section, Section 1: 2 (or 3) cleavage traces, Section 2: 1 Cleavage trace, inclined extinction, Section 3: 1 Cleavage trace, straight extinction, colourless, Section 4: 1 Cleavage trace, straight extinction, coloured, Section 5: Imperfect cleavage, parting or arranged fractures, Section 6: 0 Cleavage traces, colourless, Section 7: 0 Cleavage traces, coloured, Section 8: Opaque minerals, Appendices, References, Index