![]() ![]() Then, look at the mineral again, and check these further details. By looking at the chart, see which properties might help you distinguish between the possibilities. This should at once limit you to only a few minerals. Within each colour group, minerals are arranged in order of increasing refractive index (which more or less corresponds to relief). To identify an unknown mineral, start by answering the following questions: (1) What colour is the mineral? (2) What is the relief of the mineral? (3) Do you think you are looking at an igneous, metamorphic or sedimentary rock? Go to the chart, and scan the properties. If a mineral commonly has a range of colours, it will appear once for each colour. Within the tables, minerals are arranged by colour so as to help with identification. These tables provide a concise summary of the properties of a range of common minerals.
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