This is a Celtic Tree of Life crystal grid made out of Birch wood. It is 6 inches in diameter and 1/4" thick. 
 
The tree has roots that reach deeply into the soil, acknowledging its connection to, and accepting nourishment from, Mother Earth. Leaves and branches extend into the sky, acknowledging Father Sun and accepting the energy that it transforms into nourishment.
 
A symbol of family and connection to your ancestors. A tree symbolizes the generations of your family; a tree sprouts from a seed, grows and branches out, sees how far it can go, and then creates a new fruit that gives life to the next generation, to begin anew.