The Fundamental Rockhound Products: 1/2 lb Rough BLACK TOURMALINE Schorl Bulk Rock for Tumbling Metaphysical Gemstones Healing Crystals 1/2 pound of Black Tourmaline rough - Sizes range from 3/4 to 1 1/4" Average (6-10 pieces depending on size) . This is rough tourmaline from Brazil. Broken pieces, some will have striations (outside edges of crystals), many will not (massive rock). Tourmaline has a mohs hardness of 7.5 so can be tumbled with other hard stones: petrified wood, quartz, jasper, agate. Perfect for Tumbling Rock, Gridwork, Meditation, Metaphysical Use, Crafts, Indoor Fountains, Home or Office Decor Stones always include an official Fundamental Rockhound information card and Stone Certification. Your stones will not be the exact stones in the photo but will be very similar in size and shape. Stones are shown dry in the photo. Most stones have some natural sheen, some have a lot of natural sheen. Some stones contain veins or vugs of white quartz. WARNING: Not for Children under 6 years of age, as smaller pieces could become a choking hazard. Seller is not responsible for misuse of this product.