Amethyst Stone (Katela)

Amethyst stone is a purple-colored, semiprecious gem of the quartz mineral family. It is known as katela or jamunia in the Hindi language. It is a substitute for neelam stone and people use it to protect themselves from the evil effects of Saturn. This stone is considered extremely important in reducing the effects of alcoholism.

Physical properties/chemical composition
The chemical formula for amethyst is silicon dioxide (SiO2), and its hardness on the Mohs scale is 7. The specific gravity is 2.65, and the RI ranges from 1.544 to 1.553.