Amethyst & Ametrine
Amethyst is the purple variety of quartz and generally is the most prized variety of quartz. When heat treated it can have a deeper color or be transformed into Citrine. Some varieties can also be changed into Prasiolite. A few common varieties of amethyst include Ametrine, Canadian Amethyst and Veracruz Amethyst. It is also the wedding anniversary gemstone for the 4th and 6th year of marriage.
Chakras - Third Eye Chakra, Crown Chakra
Birthstone - February
Zodiac Sign - Aquarius (Jan 21st to Feb 19th)