Once gifted by Napoleon, the heirloom is now bejeweled in December’s birthstone Abigail Eisenstadt Turquoise makes a striking contrast against diamonds in this diadem from the 1800s. But the gems were ...

The lack of a grading system for the popular stone has prompted a father-son team to spend the last five years working on one. Turquoise stones from the blue and green master sets at the Turquoise ...

My morning walk took me by the Oroville High School, and since no students were there at 6 a.m., I entered the opened gate. Passing through, I saw some bright blue objects under a shady tree, and I ...