This ring has a bold, modern silhouette with a dark, moody centerpiece. Based on the photos, here is a breakdown for your eBay listing.
Vintage 18K HGE Black Onyx Glass Statement Ring Modernist Swirl Size 8.25
This striking modernist statement ring features a large, faceted black stone (likely onyx glass or high-quality resin) set in a dramatic, sweeping silver-tone bypass design. The architectural "swirl" mounting gives it a unique, avant-garde look that sits beautifully on the finger.
Material: 18K HGE (Heavy Gold Electroplate). While it is silver-toned, this hallmark indicates a high-quality electroplating process over a base metal, typically used to ensure a long-lasting finish.
Main Stone: Faceted oval black stone; jet black with excellent light reflection.
Design: Modernist/Abstract bypass style with open-work shoulders.
Size: Approximately 8.25 (as shown on the ring mandrel).
Condition: Good vintage condition. There is some light wear and "brassing" (thinning of the plating) on the inside of the band, consistent with age, which is not visible when worn. The stone is secure in its setting.
The "18K HGE" mark is a strong selling point because it implies a higher standard of plating than standard costume jewelry. Be sure to include the photo of the hallmark (Image 20260429_150022) in your listing so buyers can see the stamp clearly.