Tourmaline is a wonderful gemstone, that comes in so many colors and hues. It is a durable gemstone, and is almost always natural, with no treatments given to it. This one is no exception. This is a 7mmx5mm oval Canary Yellow Tourmaline. It looks more brown in the picture, but it is not. It is yellow for sure. It also exhibits stunning pleochroism, with flashes of blue and green. It is clean with no visible inclusions. This sterling silver ring, is available for sale in my Etsy store http://www.etsy.com/shop.php?user_id=6007466 for 49.99 Be sure to check it out. If you love unique, and rare gemstones, this is the ring for you.