Some minerals are very rare and pretty — we call these gemstones and they are used to make jewellery. Can you name any gemstones?
What is the most famous gemstone? Is it a Crystall or a diamond? The answer does not only look beautiful in jewellery but they are also used in drills and saws for cutting.There are three main groups of rocks — these are sedimentary, igneous and metamorphic.
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