Background[]
Amethyst- colored crystal accreted around a graviton pearl that in turn contains pure anti-matter. Void stones have enormous industrial capablity. Due to their ability to manipulate gravity fields, Void-Stones can be used for all manner of transport, construction, and practical jokes.
Effects[]
+10 
On Planet
+3 
Per 
On Planet
+2% Healing Per Void Stone On Empire
Effects If Resource Monopoly (4+):
+20% Healing On Empire