Oval Black Onyx 18x9mm


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You never go wrong with black gemstones in jewelry making.
Beautiful cut, good polish this gemstone is so ready to be transformed into amazing jewelry!


In correct usage, the name refers to a (usually) black and white banded variety of Agate (Chalcedony), or sometimes a monochromatic agate with dark and light parallel bands (brown and white for example) - but traditionally the name was reserved for black and white banded agate, and brown varieties named Sardonyx.
It possesses a smooth, wax-like luster.
It is often used as the background of a cameo broach, pendant or ring.

Size: 18x9x5mm
Type: Chalcedony
Colour: Black
Hardness: 6.5–7

These cabochons are not calibrated and might vary slightly from stone to stone.

Metaphysical properties of Onyx.