Amethyst

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