Although size doesn’t always equate to value in the world of gemstones, it’s worth pointing out that the sourdough-sized sapphire in the Ophir Collection weighs 31,308 carats, or about 14 pounds.

In this age, only diamonds, rubies, sapphires and emeralds are acknowledged as precious stones, with the diamond chief among them and all others classified as semi-precious. The terms “precious ...

When an elderly miner claimed to have found a vein of semi-precious stone in 1945, it was dismissed by many as an old miner's tale. John Royse promised to reveal the exact location to Peter ...

The rock was passed on to a relative of the elderly woman after she died. The relative examined the rock and he believed it could be a semi-precious stone of great value, according to El Pais. El ...