A Bridge quartz crystal is a smaller crystal (or crystals) penetrating and located partially in and partially out of a larger crystal.

Bridge quartz crystal helps to bridge between worlds (the inner and outer worlds between your inner and outer Selves or between yourself and others).

Bridges are helpful in any area you might imagine needing a bridge. 

They can help you heal and get in touch with your inner child (bridging the gap between your outer self and your inner self). They are also good for connection and perspective. Also called Inner Child.