The bands are often parallel but may also be irregularly spaced. It is typically banded with thin alternating black and white or brown layers but can also be found in solid shades of black or brown. Black Onyx Appearanceīlack Onyx stone is a very dark, nearly opaque variety of chalcedony. It got its name because it was used by the Greeks to make signet rings. The name ‘onyx’ comes from the Greek word ‘onux,’ which means fingernail. What Does The Word Onyx Mean (Etymology)? It is believed to increase a person’s power to focus on tasks, especially those difficult or demanding. It is known as the gem of strength and determination. It is a variety of Onyx, which is a further subtype of the Chalcedony family. The result is a banded stone with alternating layers of dark and light colors. Looking for more? The State of Colorado website has a terrific, floor-by-floor guide to the artwork inside the capitol.įree public tours are offered on the hour, Mon.–Fri., 10 a.m.–3 p.m.Īrrive 20 minutes in advance of your tour, as tours do fill up.Black Onyx stone is formed when silica-rich groundwater flows through cavities in volcanic rock, depositing silica.
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