Fantasia Materials: 1 lb of Black Obsidian Rough Stones from Mexico - Raw Natural Volcano Glass Crystals for Cabbing, Cutting, Lapidary, Tumbling, Polishing, Wire Wrapping, Wicca & Reiki Healing Premium Natural Black Obsidian Rough Perfect for Tumbling, Cabochons, Wire Wrapping, Reiki or Collecting Each and every stone is unique and you will receive stones similar to the images shown. 100% Authentic Fantasia Stones - A Brand Trusted Worldwide ** WARNING - This is naturally earth mined black obsidian volcano glass that has not been tumbled or polished. This material may contain sharp edges when received and should not be played with by children.