Vintage Designer "LB" Pink Sapphire and Pink Tourmaline Sterling Silver Ring.

Breakdown of the Markings  925: This is the global standard hallmark for Sterling Silver. It guarantees that the metal composition consists of 92.5% pure silver mixed with 7.5% alloy (usually copper) for durability.LB: This represents the maker's mark (or designer stamp).   Authentic vintage matching pieces identifying this exact design credit LB as the designer signature hallmark.  Gemstone & Design DetailsThe design features a prominent, vibrant cushion-cut lab-created pink sapphire as the center focal stone.   It is set in a split-shank band accented by a row of smaller channel-set pink tourmalines ( according to AI see all photos ) running down the shoulders.