A bright and playful Australian Coober Pedy white opal crown brooch set with diamonds to the base in a channel setting with three graduated diamonds to the top, bar brooch to reverse with pendant fitting attachment. Being a rare crystal opal with vivid colour this may be an ancient cuttlefish Belemnite fossil. Estimated total opal weight: 10.70cts. Estimated total diamond weight: 1.20cts. Assessed diamond colour: K. Assessed diamond clarity: SI1.
