Vintage Octagon Halo Green Amethyst Ring in Sterling Silver

A soft mint-green rarity, framed like an Art Deco heirloom. This green amethyst ring is built around a 0.85 carat natural green amethyst — the luminous quartz variety mineralogists call prasiolite — cradled in a six-prong basket and wrapped in a geometric octagon halo of baguette and round simulated diamond accents. Crafted in solid 925 sterling silver with a bright rhodium finish, it is a vintage-inspired engagement ring for anyone who wants color without the expected emerald or sapphire.

An Art Deco silhouette with architectural lines

Where most halo rings settle for a round or cushion frame, this one steps into geometry: a true octagon halo, an eight-sided outline drawn straight from 1920s Art Deco jewelry. Four baguette-cut simulated diamonds sit at the cardinal points to define crisp architectural edges, while round accents trace the corners and flow down the pavé shoulders. The octagon spans roughly 10.5 mm across, giving the ring genuine finger presence without overwhelming the hand. If clean lines and colored stones are your language, you will find more of them across our amethyst engagement rings collection.

The natural green amethyst

Green amethyst — known mineralogically as prasiolite — is one of the rarer members of the quartz family, and it is a genuinely natural stone: mined, never lab-grown, never simulated, never dyed. Its color is a delicate mint-to-celadon green that sits somewhere between peridot and seafoam, softer and more modern than a deep emerald. Here it is cut as a 6.0 mm round brilliant of about 0.85 carat, the most light-returning cut possible, so the pale color stays bright and lively rather than flat. To see how this stone sits within the wider quartz story, our history of gemstones guide traces its lineage beautifully, and you can browse related pieces in our amethyst jewelry range.

Simulated diamond accents

The halo and shoulders are set with bright simulated diamonds — a crisp, brilliant, budget-friendly way to add classic white sparkle that frames the soft green center and makes it glow. The alternating baguette and round cuts give the design its Deco rhythm: strong straight facets at the compass points, scattered brilliance in between. Prefer a lab-grown diamond or moissanite upgrade for the accents? Message us and we will tailor it.

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. That rhodium layer gives every ring a bright, mirror-white luster and adds a protective shield that helps resist tarnish and everyday scratches, so the silver keeps looking freshly polished. The band runs about 2.3 mm on average with a rounded comfort-fit interior, and it is nickel-free and hypoallergenic for all-day wear.

What green amethyst symbolizes

Amethyst has long been tied to clarity, calm and devotion, and its green prasiolite form adds associations with growth, renewal and abundance — a fitting emblem for a partnership you intend to nurture. As the February birthstone family, amethyst also makes a deeply personal gift; our birthstone guide is a lovely starting point. Couples drawn to meaningful colored stones often pair it from our amethyst couples rings, and for styling inspiration our roundup of the best matching rings for couples in 2026 is full of ideas.

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 green amethyst and rhodium finish at their brightest, remove the ring before showering, swimming or applying lotions, and store it in the velvet box when not worn. A soft, dry cloth restores the shine. If you are still weighing colored stones for a wedding set, our amethyst wedding bands pair naturally with this halo.