Mahogany Obsidian:  Provides strength in times of need. Provides vitality to ones life work or fulfillment of ones aspirations. Eliminates energy blocks and relieves tension. Grounding. Balances first chakra. Shamans tool. Decision making. It has been helpful in healing my gums as well.
 
Picture is an example, shapes and color will vary. Stones sold individually
 
Tumbled: measure approximately 1/2" to 3/4"+
Rough: measure approximately 3" 
 
Mahogany Obsidian Healing Properties and other items