| Black Star of Queensland, Star Sapphire |
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![]() The 733-carat Black Star of Queensland |
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| Category | Oxide mineral |
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| Color | Black |
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The Black Star of Queensland is a large gem sapphire. It is the world's largest star sapphire. It is 733 carats (146.6 g). It was discovered in Queensland in the 1930s.[1] During the 1960s, the Black Star of Queensland was on display at the Smithsonian as part of an exhibition with the Hope Diamond.[2] It was also on display at the Royal Ontario Museum from 2 June to 2 December 2007.[2]
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