Opal 17,000 carats - Opal mafi girma kuma mafi tsada a duniya har yau.

Opal mai nauyin carat 17,000 da aka gano a Kudancin Ostiraliya a 1956 shine mafi girma kuma mafi tsada a duniya har yau.An yi wa opal lakabi da "Olympic Australis" don bikin Olympics na Melbourne a waccan shekarar.kuma yana cikin cikakkiyar yanayi a Sydney tun 1997.