Topaz
Mohs hardness: 8Topaz is its own mineral species and rates 8 on the Mohs scale, yet it has poor toughness and can be damaged by a hard knock. Colors run from colorless to yellow, orange, pink and brown, and the familiar blue is usually the result of treatment. Notable sources include Brazil, Pakistan, Russia, Namibia, Nigeria, Madagascar, Mexico, Myanmar, Sri Lanka and the United States.












