This particular purple jewel captivates the audience with its mystical energies. It comes in shades of violet and purple. When the stone set in amethyst jewelry is bigger, it tends to appear purple, and if the amethyst stone set in the jewelry is smaller, it appears violet. Amethyst gemstone is basically a type of quartz crystal. This stone is very well-liked among jewelry enthusiasts because it is a stunning faceted gemstone.