563-carat sapphire on display at American Museum of Natural History(1/4)

A sapphire named Star of India is on display at the American Museum of Natural History on Feb. 5, 2021. (Photo/Agencies)

At 563 carats, the Star of India is the world's largest gem-quality blue star sapphire. Some 2 billion years old, it is also one of the most well-known objects in the world. The reimagined Allison and Roberto Mignone Halls of Gems and Minerals of the museum is expected to reopen in 2021 spring.

A sapphire named Star of India is on display at the American Museum of Natural History on Feb. 5, 2021. (Photo/Agencies)

At 563 carats, the Star of India is the world's largest gem-quality blue star sapphire. Some 2 billion years old, it is also one of the most well-known objects in the world. The reimagined Allison and Roberto Mignone Halls of Gems and Minerals of the museum is expected to reopen in 2021 spring.

A sapphire named Star of India is on display at the American Museum of Natural History on Feb. 5, 2021. (Photo/Agencies)

At 563 carats, the Star of India is the world's largest gem-quality blue star sapphire. Some 2 billion years old, it is also one of the most well-known objects in the world. The reimagined Allison and Roberto Mignone Halls of Gems and Minerals of the museum is expected to reopen in 2021 spring.

A sapphire named Star of India is on display at the American Museum of Natural History on Feb. 5, 2021. (Photo/Agencies)

At 563 carats, the Star of India is the world's largest gem-quality blue star sapphire. Some 2 billion years old, it is also one of the most well-known objects in the world. The reimagined Allison and Roberto Mignone Halls of Gems and Minerals of the museum is expected to reopen in 2021 spring.