It looks a bit like chrysoprase but I'm not an expert there. I wouldn't say it was corundum - where did you find it Nikos? Did it get caught in your sluice?
Found it in a creek bed..I initially thought phrase as well but once I had cleaned it..I began to doubt..some areas on the edges go from green..to clear..to blue..gold in some areas..it's translucent..phrase is cloudy..waxy..