Opal 17,000-carat a chọtara na South Australia na 1956 bụ opal kasị ukwuu na nke kachasị ọnụ n'ụwa ruo taa.Akpọrọ opal ahụ "Olympic Australis" iji mee emume Olympic Melbourne n'afọ ahụ.ma nọrọkwa na ọnọdụ zuru oke na Sydney kemgbe 1997.
Oge nzipu: Eprel-19-2022