- Brand: Casa de plata
- Product Code: CSB-49
- Availability: By Order
Black Onyx is black and white banded agate (cryptocrystalline or chalcedony quartz). It should not to be confused with onyx marble, which is limestone. The banding of onyx is parallel and consistent. Some varieties of onyx differ in color, such as sard onyx, which has a brown base and white upper layer, cornelian onyx, which has a red base and white upper layer, and niccolo onyx, which has a very thin upper layer, allowing the black base color to show through as grey or blue. Onyx takes its name from the Greek word "onux", which means fingernail; this could be due to a Greek legend, in which Eros mischievously cut the fingernails of Aphrodite with an arrowhead whilst she slept, and the gods turned the clippings into stone. Onyx was cut and carved as a gemstone by the Ancient Greeks and Romans in cameos. Intaglio etchings (negative relief engravings) were also made from onyx. These carvings showcase the banding of onyx.
The Romans admired moonstone and believed that it came from the rays of the moon made solid. Moonstones have been used as jewels for hundreds of years. They were admired by the ancient Romans and Greeks, and then were used in Art Nouveau jewelry. Moonstones later became popular during the hippie movement of the 1960s and the contemporary New Age spiritual movement