Every gemstone has its unique color due to its material composition. When light passes through a gemstone, some of it is refracted, causing the gemstone to emit colors such as blue, green, red, or purple. These vibrant colors make gemstones special, allowing them to be used for various purposes. The choice of gemstone placement, whether in jewelry or elsewhere, depends on fashion trends or astrological significance. Based on specific needs, the appropriate gemstone is selected.