MCI Sterling Silver Onyx Ring Size 7.5 Modernist Design Signed 925 EXC 5g

This stunning vintage ring by Montana Casting Inc. (MCI) is crafted in sterling silver and features a bold marquise-cut black onyx stone in a sleek, sculptural wrap design. The modernist style and high polish give it a timeless, high-end look. • Brand: Montana Casting Inc. (MCI) • Marked: MCI 925 • Size: 7.5 • Stone: Black Onyx • Metal: Sterling Silver • Condition: Excellent vintage condition — clean setting, smooth stone, no chips or cracks • Design: Wrap-around modernist form, bold and elegant • Era: Likely 1970s–1990s A rare and striking statement ring with enduring appeal.