Mineral Species: Quartz
Chemical Formula: SiO2
Mohs Scale Hardness: 7
Location: Worldwide. Abundant in Brazil.
Typical Appearance: Purple and translucent.
Common variants of Amethyst:
- Amegreen - Amethyst with areas of green colouring caused from Prasiolite, but some pieces can be the result of heat-treating (see Green Amethyst)
- Ametrine - Amethyst and Citrine mix. Purple with areas of orange colouring
- Chevron Amethyst - Amethyst with white banding
- Green Amethyst - Pale light green Amethyst. Colour usually obtained by heat-treating certain types of Amethyst
- Orange/Yellow Amethyst aka 'Citrine' - Heat treated Amethyst
- Red Amethyst - Dark reddish-brown colouring. Usually not really translucent
- Royal Amethyst - High grade Amethyst, deep purple colour, usually from Uruguay