Polished Black Moonstone Prism Home DecorThis is a beautifully polished Black Moonstone prism. The base color is a deep black, and lines of white go in every direction throughout the specimen. You can also see iridescent spots. Where To Buy Black Moonstone Tower? Black Moonstone is a variety of Moonstone discovered very recently in Madagascar. It can be found in black, tan, white, and grey throughout almost every piece you will ever see. You can also find this stone made into different