This is a Triangle crystal grid made out of Birch wood. This is just for the grid, stones may be purchased separately.
The triangle as a symbol is connected to the number three for obvious reasons. It can represent different things if it is oriented in different directions. It can symbolize gender based on how it is positioned. It will symbolize the power of the male, fire, and a false view of God when the point is directed upwards. Christians will see the triangle as a symbol of the Trinity.