This the most highly prized form of quartz. High quality crystals are still used as a semi-precious gem. Amethyst crystals always grow from a base. The color is due to the presence of ferric iron. The distribution of color bands and wavy parallel lines distinguishes amethysts from crystals of a similar appearance.
Crystal structure : Hexagonal
Color : Violet, purple or pink
Amethyst - it is soothing and calming to the mind and thought forms. Helps disperse migraine and insomnia. Helps reach higher realms of thought. Strong protection stone.