Rich Brown Petrified Wood Slab with Wood Display Stand. This piece is mirror polished on the front side with a light polish on the backside. Measures: 11″ x 9″ x 1. Weight: 6 lbs, 2 oz. Petrified wood is the fossilized remains of trees or other vegetation buried under pressure that results in a complete transition to stone. All the organic materials have been replaced with minerals while retaining the original structure of the tree. There are many uses for petrified wood in your home, such as a trivet for hot serving dishes, a cheese board, small table top, or as a stunning display on your mantel or bookcase.