Yellow Sapphire, 64 ct Faceted from United States

The rough and cut sapphires in this image are all natural-color stones from the Missouri River's El Dorado Bar. Just below the 1.53-ct sapphire ring is the largest stone, weighing in at 10 carats rough. In all, the rough in this photo is 64 carats.  © Earth's Treasury. Used with permission.

Article: Why We Love Montana Sapphires and Yogo Sapphires

Credit: Earth’s Treasury