Gemstones captivate us with their dazzling colours and unique patterns. But what exactly causes these colours? Why do some stones display a range of hues, while others shine with a single, pure colour? Understanding gemstone colouration reveals the fascinating natural processes behind these beautiful crystals. This post explores the science of gemstone colouration, focusing on affordable, semi-precious gemstones that are readily available. Whether you are a collector, healer,