Sotheby's, London, June 1998

Lot 337 Fine Ruby and Diamond Crossover Ring, by Bulgari

Claw-set with a circular-cut ruby stated to weigh 2.90ct and a similarly cut diamond stated to weigh 1.88ct between baguette diamond single stone shoulders
signed: Bvlgari; case by Bvlgari

Accompanied by a certificate from Gemresearch Laboratory, Lucerne, Switzerland, no. 9804026 stating the ruby to be from Burma (Mogok, Myanmar), no indication of thermal treatment