glass opal ring

Most listings use simulated or created opals—often labeled as 'simulated opal' or 'simulated/created fire opal' rather than natural opal.

Common shapes are round and oval. Center-stone dimensions range from smaller ovals like 6×4 mm up to larger simulated stones listed as 17×12 mm, with several pieces around 8×6 mm or 8×5.5 mm.

Simulated opal colors shown include black, purple, white, and blue; some listings also mention red and green as color options.

Many rings use cubic zirconia (CZ) accents—clear/white, purple, or blue CZs are listed. One design specifically notes a halo of twelve 1.5 mm clear cubic zirconia accents.

Reported top/overall widths range from about 12 mm at the top up to around 20 mm for some statement-style designs.

Listings describe the center stones as simulated or created opals. Some also state the stones are handmade, so individual flake patterns can vary between pieces.

Visible sizes listed in the results include 6, 8, 10, 11, and 12.