Heat and irradiation treatments can also enhance or alter the colors of topaz, making it one of the most versatile and widely ...

October has two birthstones: opal and tourmaline. Opal is the traditional birthstone for October. This gemstone is well-known for its "play-of-color," or ability to shift color. Opals often have a ...

Two years ago, the jewelry designer Vanessa Fernández found herself admiring a curious green stone at a gem show in Tucson, ...