Astra Black Onyx Engagement Ring in Sterling Silver

Midnight, cut into an oval. This black onyx engagement ring centers a deep, glossy jet-black onyx in a smooth oval cabochon, lifted on a vintage-inspired band that glitters with simulated diamonds. Crafted in solid 925 sterling silver with a rhodium finish, it is a confident, celestial-leaning alternative for anyone who finds classic clear solitaires a little too expected.

The natural black onyx

The center is a natural black onyx — a genuine chalcedony celebrated for its dense, opaque, jet-black color and mirror-glossy polish. It sits around 6.5–7 on the Mohs scale, a firm and wearable hardness, and its saturated darkness gives the ring a bottomless, night-sky quality that draws the eye straight to the finger. The oval shape softens the drama just enough to feel timeless. If the deep palette speaks to you, explore the full black onyx engagement rings collection, and read why the stone resonates so deeply in our guide to black onyx meaning.

A vintage-inspired band

The band takes its cues from antique jewelry, with sparkling simulated diamonds (cubic zirconia) lining the shoulders in a delicate contrast that makes the onyx read even richer. It is a bright, budget-friendly way to add classic engagement-ring shimmer without competing with the darkness at the center. Prefer a lab-grown diamond or moissanite upgrade? Message us — most of our designs can be tailored to suit.

Gothic, celestial, alternative

With its inky center and star-bright accents, the ring reads equal parts gothic and celestial — a natural fit for anyone drawn to dark-romantic or night-sky aesthetics. It sits comfortably among our gothic engagement rings, and for couples who want to carry the theme across two hands, our black onyx couples rings offer matching companions. For styling ideas, our edit of gothic wedding rings and dark-romance styles is full of inspiration.

Solid sterling silver with a rhodium finish

The ring is crafted in solid 925 sterling silver and finished with rhodium — the same precious metal used on fine white-gold jewelry. That rhodium layer gives the silver a bright, mirror-white luster and adds a protective shield that helps resist tarnish and everyday scratches, keeping the metal looking freshly polished. It is the detail that lets a sterling silver ring wear like something far more expensive, and genuine 925 will not turn your skin green.

What black onyx symbolizes

Long regarded as a stone of protection, grounding and inner strength, black onyx has been worn for centuries as a talisman for resolve and steady focus — which is exactly why it has become such a meaningful choice for a non-traditional engagement or promise ring. It is an emblem for a love that stays composed and rooted through anything. To see where its dramatic, romantic styling comes from, our feature on Victorian gothic engagement rings is a rich starting point.

Specifications

Sizing & care

Choose your size at checkout. If you are between sizes or unsure, we are happy to help, and if the fit is not quite right, resizing is available and starts from a modest fee. To keep the onyx and rhodium finish at their brightest, remove the ring before showering, swimming or applying lotions and perfumes, and store it in the velvet box when not worn. A soft, dry cloth restores the shine. With gentle care, this is a ring made to be worn every day.