This awesome 5.2 inch diameter sphere of natural black volcanic glass (obsidian) was made from a single large chunk of very pure quality obsidian rough that was mined ethically and respectfully in Mexico. ***It has an excellent finish. Genuine black obsidian sphere weighs 5.7 lbs ***Black Obsidian Sphere Dimensions: 5.2" diameter Black Obsidian is very popular today for metaphysical use, Black Obsidian is know to increase self-control and to release imbalances and negative energies. A Certificate of Authenticity from our main website www.mineralminers.com will accompany this awesome item at no additional cost to you. Primary picture was taken inside under fluorescent lights At MineralMiners.com your satisfaction is our top priority! We guarantee Unique Items, Superb Energy and Collector Quality at Miner's Prices! ? Have a "Gem" day!