Black Moonstone Tumbled

Has all of the properties of White Moonstone, with an extra focus on New Moon energy, or the beginning of things. Very protective, deflecting negative energy, and transforming them back to light. More grounding than other Moonstones, it has a much gentler energy than other Root Chakra crystals like Black Tourmaline. Blank Moonstone is especially suitable for New Moon Rituals.
Hall - "The Crystal Bible"