Images Jewelers's video: One of natures finest gemstones: BLACK OPAL

http://www.imagesjewelers.com/custom-jewelry.html Although experts classify gem opals into a variety of categories, five of the main types are: White or light opal: Translucent to semitranslucent, with play-of-color against a white or light gray background color, called bodycolor. Black opal: Translucent to opaque, with play-of-color against a black or other dark background. Fire opal: Transparent to translucent, with brown, yellow, orange, or red bodycolor. This material—which often doesn't show play-of-color—is also known as "Mexican opal." Boulder opal: Translucent to opaque, with play-of-color against a light to dark background. Fragments of the surrounding rock, called matrix, become part of the finished gem. Crystal or water opal: Transparent to semitransparent, with a clear background. This type shows exceptional play-of-color. http://www.imagesjewelers.com/custom-jewelry.html