Black Onyx Jewelry (Natural)

Natural Black Onyx Jewelry: Rings, Necklaces and Earrings

Black onyx is the most graphic stone in our range. Its deep, even black takes a mirror polish and provides the strongest possible contrast with white diamonds and bright metal, which is why it has been a staple of art deco and modernist jewelry for a century. It reads elegant rather than loud, and it suits people who want presence without colour. The collection includes onyx solitaire and halo rings, pendant necklaces and earrings, each made to order in the metal and gemstone size you choose.

What Makes Black Onyx Special

Onyx is a banded variety of chalcedony, a microcrystalline form of quartz. The black material used in jewelry is prized for uniform colour with no visible banding or inclusions, giving the stone its characteristic depth. Because the structure is microcrystalline rather than a single crystal, onyx is tough and takes a superb polish, whether cut flat, faceted or domed. It sits at 6.5 to 7 on the Mohs scale, hard enough for everyday wear with reasonable care. Our onyx is natural material, hand selected for even colour and a flawless surface, since any scratch or pit shows immediately on a black stone.

Black Onyx, Birthstones and Meaning

Onyx is not one of the modern monthly birthstones, but it sits on the traditional lists as a July birthstone, and its close relative sardonyx is the traditional stone for August, so onyx is given for both months. It is strongly associated with Leo and Capricorn, and in crystal tradition with grounding, protection and steady resolve, which is why it appears so often in signet rings and in jewelry worn for focus. If you need a stone tied to a specific month, our birthstone collections cover all twelve, and onyx pairs beautifully with most of them as an accent.

Black Onyx Rings, Necklaces and Earrings

Onyx suits bold, clean shapes. Round and oval cabochons give a soft, liquid surface, while faceted cushion and emerald cuts create sharp reflections and a more contemporary look. Halo settings of white accent diamonds produce the classic monochrome contrast that makes onyx so photogenic. Bezel settings protect the edges and emphasise the geometry of the stone. In necklaces, an onyx pendant sits beautifully against both skin and clothing, and in earrings the stone frames the face without competing with colour elsewhere in an outfit.

Metals, Sizes and Made to Order Craft

Offered in Platinum 950, 14K white gold, 14K yellow gold, 14K rose gold and 925 sterling silver. White metals give the crisp black and white contrast associated with art deco design. Yellow gold against black is the richest looking combination and reads as unmistakably expensive. Rose gold softens the contrast for a warmer, more modern effect. Rings are made in your exact finger size, gemstone sizes are listed on every product page, and each piece is crafted after you order.

Caring for Your Black Onyx Jewelry

Because onyx is polished to a mirror finish, scratches and dulling show more than they would on a faceted coloured stone. Remove pieces before sport, cleaning and manual work, and store them in a pouch away from harder gems. Clean with a soft damp cloth and mild soap, then dry immediately. Avoid ultrasonic cleaners, harsh chemicals and prolonged heat, and put jewelry on after perfumes and lotions so residue does not build up on the surface.

Why Shop Black Onyx at Gem Noir

Every onyx is chosen for even colour and a clean polish, then set by hand in the metal and size you choose after you order. Shipping within the US is free and insured, first resizing within thirty days is free, and returns are open for thirty days from delivery.