Dioptase
The Healing Heart Stone
Relatively rare crystal. Dark deep Emerald colour with Green Black composition. 
Dioptase is a very powerful stone I use in my practise everyday. It anchors the green healing rays of the heart deeper into physicality. Touches the importance of compassion, non-attachment and non-judgement.  Something we all need whilst our Earth is reconfiguring into a new world.
In Atlantian times it was known as the 'Earth Emerald'.
I don't have many of these, get one whilst you can.