These are mystical crystals created from black moonstones found in India. Black moonstone has a high vibration as it is a mixture of the white rainbow moonstone, which activates your crown chakra and connects with the waxing and waning of the moon - and dark grounding energy that activates your root chakra - opening the dark mystical high priestess energy that resides within you. It is an incredibly potent stone. Black moonstone will help you on your vision quests and assist you in setting intentions for whatever it is you wish to manifest.
