Heat and irradiation treatments can also enhance or alter the colors of topaz, making it one of the most versatile and widely treated gemstones on the market. Tourmaline is one of the most ...
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 ...
New York-based, upmarket gemstone dealer has created a series of oil paintings entitled "Tree Portraits" that celebrates the ...