Warm Onyx

Onyx

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".

Shades of black

Shades of black, or off-black colors, are colors that differ only slightly from pure black. These colors have a low lightness. From a photometric point of view, a color which differs slightly from black always has low relative luminance. Colors often considered "shades of black" include onyx, black olive, charcoal, and jet.

warm

Adjective

1. Of a somewhat high temperature, often but not always connoting that the high temperature is pleasant rather than uncomfortable.
2. Friendly and with affection.

Verb

1. To make or keep warm.
2. To become warm, to heat up.

onyx

Noun

1. A banded variety of chalcedony, a cryptocrystalline form of quartz.
2. A jet-black color, named after the gemstone.

Adjective

1. Jet-black; often, glossily so.