1.1.- What minerals are
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We can distinguish among different minerals by hardness, colour and brightness. There are very hard minerals such as diamond and very soft ones such as talc. [ The classification of minerals by their hardness is called Mohs scale ]. Also, there are minerals with characteristic colours such as malachite (green); and another with different colours such as beryl (green, blue, yellow,…).
There are very metallic bright minerals
such as pyrite and however there are matt minerals too. |
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Diamond |
Malachite |
Pyrite |
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