Onyx
Banded variety of the mineral chalcedony
Nº Q180884 ★★★★
Super Rare · Knowledge
Onyx
Banded variety of the mineral chalcedony
Onyx is a typically black-and-white banded variety of agate, a silicate mineral. The bands can also be monochromatic with alternating light and dark bands. Sardonyx is a variety with red to brown bands alternated with black or white bands.
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From Wikipedia
Onyx is a typically black-and-white banded variety of agate, a silicate mineral. The bands can also be monochromatic with alternating light and dark bands. Sardonyx is a variety with red to brown bands alternated with black or white bands. The name "onyx" is also frequently used for level-banded (parallel-banded) agates, but in proper usage it refers to color pattern not band structure. Onyx, as a descriptive term, has also been incorrectly applied to parallel-banded varieties of alabaster, marble, calcite, obsidian, and opal, and misleadingly to materials with contorted banding, such as "cave onyx" and "Mexican onyx".
Text: Wikipédia, CC BY-SA 4.0. · Image: Simon Eugster --Simon 14:41, 11 April 2006 (UTC) (CC BY-SA 3.0) ·
