Black Onyx

Onyx is formed of bands of chalcedony in alternating colors. It is cryptocrystalline, consisting of fine intergrowths of the silica minerals quartz and moganite. Its bands are parallel to one another, as opposed to the more chaotic banding that often occurs in agates.

Sardonyx is a variant in which the colored bands are sard (shades of red) rather than black. Black onyx is perhaps the most famous variety, but is not as common as onyx with colored bands. Artificial treatments have been used since ancient times to produce the both the black color in "black onyx" and the reds and yellows in sardonyx. Most "black onyx" on the market is artificially colored.

8mm Matt Black Onyx
 These 8mm round black onyx with a matt finish work well for men's jewelry or a more subdued look.
blackonyx003 $9.00$6.00
Matte Black Onyx Round...
 10mm Matte Black Onyx Rounds are elegant to say the least. Onyx is found around the world and a protective stone, …
bom003 $9.00$6.00
black Onyx 12mm facete...
 12mm black onyx matte friendship beads with polished faceted sides. They fit well together and create a unique loo…
blackonyx002 $90.00$60.00
10mm Black Onyx Facete...
 10mm Faceted Black Onyx
BOP003 $21.00$14.00
Black Onyx 10mm Facete...
 Approximately 16 inches long
BOP002 $30.00$20.00
Black Onyx Matt Finish...
 16 inch strand of matt finish faceted black onyx.  Measure 8mm each
blackonyx001 $15.00$10.00
10x10mm Onyx Cubes
10x10mm Onyx Cubes
bop032 $24.00$16.00
12x12mm Black Onyx Fac...
12x12mm Black Onyx Faceted Lantern
bop023 $60.00$40.00
30x10mm Matte Black On...
30x10mm Matte Black Onyx Marquise Shape
bom019 $42.00$28.00
32x20mm Black Onyx Mat...
32x20mm Black Onyx Matte
bom018 $27.00$18.00
31mm x 21mm Black Onyx...
31mm x 21mm Black Onyx faceted ovals
bop021 $15.00$10.00
Black Onyx 14x9mm avg ...
Black Onyx 14x9mm avg size
bop019 $18.00$12.00
Black Onyx 16" Strand
Polished Finish
bop001 $12.00$8.00
Black Onyx 16" Strand
Matte Style 16" Gemstone Strand
bom008 $12.00$8.00
Black Onyx 16" Strand
Matte Style 16" Gemstone Strand
bom001 $30.00$20.00

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