A Large Chalcedony Ring. A Pink Chalcedony Ring. The briolette gemstone weighs 40.50 cts. 18ct yellow gold -750 18ct. Chalcedony measures 24mm. it weighs 39.50 cts.This lovely designer ring features a soft rose coloured chalcedony stone. This stone has a beautiful milky tone Created by Massimo in Milan for the La Scala collection,