The boy brought home a dull-colored half-pound stone he found on the hillside, and his father, Harry Spencer, thought of the perfect place for it. They would use it as a doorstop. The year was ...

A gemstone broker fished a dusty rock from a Tupperware dish at an Arizona mineral show and paid $10 for what his trained eye knew to be the world`s largest star sapphire, valued at $2.28 million.

Queensland has produced some of the world’s most famous sapphires: the Black Star of Queensland at 1,156 carats (uncut), is the largest black sapphire ever found. It was discovered on the Anakie ...