These beautiful natural green halites from Poland have a wonderful structure and translucency, with a gentle hint of green. 
Green halite is a translucent, cubic crystal of sodium chloride (NaCl), also known as rock salt, that is colored by mineral impurities.
Halite forms when salt-rich waters evaporate
The green color comes from inclusions of atacamite
Rudna Copper Mine in Lubin, Poland