Robuta

https://www.christies.com/zh/lot/lot-6312217 HEMMERLE ORANGE SAPPHIRE AND COPPER 'CORTINARIUS SANGUINEUS' BROOCH | Christie's HEMMERLE ORANGE SAPPHIRE AND COPPER 'CORTINARIUS SANGUINEUS' BROOCH orange sapphire cortinarius sanguineus hemmerle copper brooch