Fluorite When it comes to colourful minerals, many think of sapphires and rubies, but fluorite also comes in lots of colours. The colours are determined by the chemicals within it and how the light interacts. Image Credit Quartz Squeezing a quartz crystal generates the smallest electrical current, which can be used in batteries for keeping time in watches and clocks. Sugar The lowly sugar cube is amazing! Go into a dark room and break up the cubes with a glass. You’ll see “triboluminescence,” a faint blue glow. Autunite Another fascinating…
Read MoreTen Crystals With Amazing Properties
