Ring "stone in a beaded bezel"

Colour: Yellowish, purple, pink, green/pink, bluish-brown; silver.
Shape: Slightly oval stone in a smoothly polished setting with a beaded bezel, narrow ring splitting at the top, smoothly polished.
Material: Opal/amethyst/spinel/topaz/labradorite stone in cabochon cut or faceted (stone 8x6mm), sterling silver.
Size: 51, 56.
Country: India.