Onyx Heart

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".

Heart

The heart is a muscular organ found in humans and other animals. This organ pumps blood through the blood vessels. The heart and blood vessels together make up the circulatory system. The pumped blood carries oxygen and nutrients to the tissue, while carrying metabolic waste such as carbon dioxide to the lungs. In humans, the heart is approximately the size of a closed fist and is located between the lungs, in the middle compartment of the chest, called the mediastinum.

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.

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.

heart

Noun

1. A muscular organ that pumps blood through the body, traditionally thought to be the seat of emotion.
2. One's feelings and emotions, especially considered as part of one's character.

Verb

1. To be fond of. Often bracketed or abbreviated with a heart symbol. .mw-parser-output .defdate{font-size:smaller}
2. To mark a comment, post, reply, etc., with the heart symbol (❤).