Amethyst was a valuable gem until the discovery of large deposits in South America in the late 1800s; Brazil is the primary exporter to this day, although it is common in many countries. Still, its deep and attractive color makes it extremely popular. Banding - darker and lighter zones of color - is quite common. A good amethyst will be very clear, and the deeper the color, the better. The most common enhancements are heat and irradiation. Try not to expose an amethyst to excessive amounts of bright sunlight, as this can fade its color.
Pale lilac to deep purple
The most precious form of quartz, amethyst receives its color from iron and manganese. Durable, with a Mohs' hardness rating of 7.

Cushion-Cut Amethyst Ring in 14K White Gold with Diamond Accents
Pear-Shaped Pink Amethyst Ring in 10K Rose Gold with Diamond Accents 

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