Fundamental Rockhound Products: Rough BLACK ONYX Bulk Rock for Tumbling Metaphysical Gemstones Healing Crystals Wholesale Lot from Brazil (1/2 lb) 1/2 pound Black Onyx rough - Sizes range from 1 to 1 1/2" Average. This is untreated, unheated, 100% natural stone. Perfect for Tumbling Rock, Gridwork, Meditation, Metaphysical Use, Crafts, Indoor Fountains, Home or Office Decor Stones are shown wet in the photo #1 so you know how they'll appear after polishing. They will not be this brightly colored when you receive them; they are rough, unpolished rock - please see photo#2. The stone is black to grey black with occasonal white calite and occasional red iron stains. Your stones will not be the exact stones in the photo but will be very similar in size and shape 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.