The highest quality is transparent.
Amethyst is an affordable purple gemstone.
Care and Treatment Clean your Amethyst in ultrasonic jewelry cleaner or with warm, soapy water and a soft bristle brush. Amethyst often becomes paler if kept out in the sun. Amethyst is sometimes heat treated to create Citrine. Hardness Amethyst has a hardness of 7. Lore Often amethyst is given as a symbol of sincerity, security, and peace of mind.