Atlantisite is a trade name for a rather lovely stone that combines Stichtite and Serpentine.
The most commonly known source is Tasmania, but it also comes from South Africa.

Stichtite is deeply healing. It can assist us to resolve old emotional issues and mental patterns, personal and ancestral. It primarily resonates with heart, brow and crown chakras, helping to bring insights and understanding and promoting compassion and forgiveness.

Serpentine connects us with the ancient wisdom of the Earth, reminds us that we are not separate but part of Earth, and that matter and spirit are One.
It is both grounding and energising - deeply and profoundly healing on all levels.
It works well to ground high frequency crystal energy. 

Atlantisite is a wonderful stone for meditation.