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Unformatted text preview: A s s e s s m e n t B r a n c h – 9 – G e o l o g y 1 2 2 7 / 8 S c h o o l Y e a r D a t a P a g e s Properties of Common and Important Minerals Mineral Colour Streak Lustre Form and Other Properties Cleavage Hardness Amphibole (hornblende) dark green to black white-grey vitreous long crystals, grains 2 excellent at 56° 6 3.0 – 3.4 Apatite usually green white vitreous hexagonal crystals 1 poor, conchoidal fracture 5 3.1 Asbestos green or black none to white waxy fibrous or silky masses none 2.5 – 5.0 3.1 Azurite blue pale blue earthy–vitreous earthy mass or tiny crystals, fizzes in acid seldom visible 3.5 – 4.0 3.8 Bornite iridescent blue, purple grey-black metallic dense brittle masses none 3 5.0 Calcite white, pink or yellow white-grey vitreous rhombohedral crystals, granular, fizzes in acid 3 perfect, not at 90° 3 2.7 Chalcopyrite golden-brassy yellow black metallic tetrahedral crystals or fine-grained masses 1 poor 3.5 – 4.0 4.2 Chlorite green to dark green pale green...
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This note was uploaded on 02/27/2010 for the course EARTH SCIE 1028 taught by Professor Hicko during the Spring '10 term at UWO.
- Spring '10