Serendipity Sapphire is the world's largest star sapphire cluster, and it weighs 510 kilograms (2,600,000 carats).
[1] It was found in Kahawatte, in the Ratnapura District, Sri Lanka, in July 2021.
Its worth is estimated to be up to US$100 million.
[1] [2] The cluster is 100 centimetres (39 in) in length, 72 centimetres (28 in) in width, and 50 centimetres (20 in) in height.
[3]