Fantasia Materials: 1 lb Black Tourmaline Chunk Rough - (Select 1 to 18 lbs) - Raw Natural Crystals for Cabbing, Cutting, Lapidary, Tumbling, Polishing, Wire Wrapping, Wicca and Reiki Crystal Healing Premium Natural Black Tourmaline Rough Perfect for Tumbling, Cabochons, Wire Wrapping, Reiki or Collecting Natural and Untreated Directly from the Black Tourmaline Mine Large Stone Sizes Average 15-30 Grams Each 100% Authentic Fantasia Rough - A Brand Trusted Worldwide