Obsidian "Volcanic Glass" 
Everyone, meet Obsidian, an igneous rock that forms from melted rock, or magma. Obsidian is an "extrusive” rock, which means it is made from magma that erupted out of a volcano. 
Obsidian is a highly-regarded protective stone, known for its ability to block, absorb, and transform negative energy. Obsidian is believed to be a stone of clarity, with the ability to release emotional, physical, and spiritual blockages, drawing out stress and tension.
Ethically sourced from Chihuahua, Mexico
* Please note that no two crystals are alike.
Each one is unique in its own way. Expect some variation in the one you receive.