Grade A + Rough Black Obsidian Stones, Natural Raw Black Obsidian Quartz, High-quality Specimens From Mexico. Size: range from 1" to 2 ", average: 1.5" Each Rough Black Obsidian Quartz stone is irregular, unpolished and rough and the quantities of stone depend on the size and weight of each stone. As a guide, each 1 lb lot will typically contain anywhere from 8 to 11 individual stones. (Guide only, may vary, sold by weight). Wholesale bulk lot: You can choose the weight of your order - 1/4 lb, 1/2 lb, 1 lb, 3 lbs, 5 lbs or 11 lbs. known to be very protective and energy clearing. Can be used in energy, tumbling, decoration, jewelry making, chakra balancing, reiki or other metaphysical practices and more. Perfect gift for beginners or collect crystals. Black obsidian is a great grounding stone, and its energy may work by helping you in moving any excess energy down thru the earth star chakra through Mother Gaia for grounding. Another facet of black obsidian is its ability to draw in negative energy, thus protecting the wearer or the surroundings in which it is placed. As such, black obsidian is used as protection in various body adornments and in many areas of the home.