Onyx
Onyx is a variety of the microcrystalline quartz, chalcedony. Onyx is similar to agate, but it has straight rather than curved bands. The name comes from the Greek onux, meaning "nail" or "claw", referring to the mineral's color. Onyx seals were very popular with the Romans, who carved patterns of a seal in negative relief to give a raised print. The name Onyx is properly applied only to the agate variety. Other varieties include carnelian onyx and sardonyx. Onyx is believed to aid in learning lessons, imparting self-confidence and helping you to be at ease in your surroundings. Onyx, is said to hold the memories of things that have happened to the wearer.
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