Text: Onyx - a symbol of eloquence. Stone's names: Onyx, Sardonyx (with white and brown bands). Color: Onyx is a gemstone with alternating light and dark bands, which are colored in brown, red, black, white and grey. Description: SiO2 Onyx is striped, semiprecious variety of the silica mineral agate with white and black, brown or red alternating bands. Its properties are the same as those of quartz. Birthstone: Sardonyx is the birthstone of Leo (Lion): July 23 - Aug 22. Wedding anniversary: Onyx is the anniversary gemstone for the 7th year of marriage. Black Onyx is the anniversary gemstone for the 10th year of marriage. Varieties: Varieties of onyx include carnelian onyx, with white and red bands, and sardonyx, with white and brown bands. Care and treatment: Onyx may chip or scratch rather easily, so store onyx carefully and never allow two specimens to touch each other. From the stone history: The name onyx was used by the Romans for a variety of stones including alabaster, chalcedony, and what is now known as onyx marble. Cameos are cut from stones, such as onyx or agate, where different colors occur in layers. The background material is cut away, leaving the cameo design in relief. Onyx is also used in intaglios because its layers can be cut to show a color contrast between the design and the background. Sardonyx at one time was more precious than gold, silver, or sapphire. Sardonyx is always widely used in cameos and intaglios. Shopping guide: Onyx is a rich-looking, affordable gemstone. It is often mixed with pearls to create elegant jewelry. Treated agate is often sold as Black Onyx. Healing ability: Onyx is used as a heart, kidney, nerve, capillary, hair, eye and nail strengthener. Onyx is said to help one sleep. This gemstone helps to eliminate apathy, stress and neurological disorders. Mystical power: This gemstone eliminates negative thinking, it is also believed to sharpen the wits of the wearer. Onyx is said to bring spiritual inspiration. It is a great assistance in holding emotions and passions under control. Black Onyx is used to help one change habits. Deposits: The chief localities of onyx are India and South America.

See Also: SARD; SARDONYZ

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