A vintage 10K yellow gold cocktail ring featuring a large, round-cut smoky quartz. The stone is set in a classic high setting with six neat prongs, allowing maximum light to penetrate the gem and highlight its deep golden-brown hue. Product details: Base material: A slender cast band of 375-grade (9K) yellow gold. Main stone: Natural smoky quartz with a precise, symmetrical cut. Large cocktail rings of this style were incredibly popular during the mid- to late-20th century.