Dark green rock but not jade?

[Katie1234]

I recently found a reasonably large rock in a river in New Zealand. I thought it might of been greenstone but a quick google search found that it looks nothing alike. When fully dry it's a darkish green colour (also it has different shades of green) but when wet it's very dark green. It's not shiny or anything I have no idea weather this is just a 'green rock' or if it's something more. Please help me

 

[mamabear]

really need a picture to be able to ID it. sorry.

 

[CASPER-2]

https://www.google.com/search?q=mal...QFMin2AWc3YDACQ&ved=0CDQQsAQ&biw=1366&bih=622