Answer:
1: Crystals are used in solar cells. Solar cells provide power for different resources. Silicon, which forms tetragonal crystal, are used for solar cells.
2: Crystals are used in the making of transistors.
3: Liquid crystal is used to produce wrist-watches.
4: Pocket calculators use liquid crystals.
5: Humans use crystals as different forms of luck. For example, carnelian is a crystal to produce confidence and crystals of a diamond are used for prosperity.
6: Some crystals are used for medical purposes. For example; aquamarine is a crystal used for regulating the immune system.
7: Crystals can be used in chemistry experiments to separate out compounds from mixtures.
8: Crystals are being used for healing of ailments.
