A gem cutter in Ratnapura, Sri Lanka's main gem-mining town, unearthed a blue star sapphire weighing 1,404.49 carats in 2015, roughly double the size of the previous record holder. The stone was certified by the Gemmological Institute of Colombo and named the Star of Adam. It remains the largest gem-quality blue star sapphire ever documented.
Record no. MRB-2026-005926
Largest Blue Star Sapphire in the World
Reference Record – Not Certified
This record is compiled from publicly available sources for reference. It has not been examined or certified by The Book of World Records.