Onyx is a gemstone that has been popular for centuries, especially for men’s signet and intaglio rings. This chalcedony gemstone is known for its beautiful black color, which exudes confidence and authority, and for guarding the heart from romantic obsession. Onyx has a hardness of 6.5-7 on the Mohs scale, making it durable and perfect for daily wear. It is sourced from Brazil, Madagascar, the United States, and Uruguay, and some Onyx is enhanced through dyeing to improve its color and appearance. Onyx is a stunning gemstone that is perfect for those seeking power, confidence, and durability in their jewelry.