Colour Feast continues: Green man-made and natural Crystals

It is time to continue the colour series: GREEN. I want you to drool over these lovely green colours that nature has created in crystals and also some man-made crystals which can be equally inspirational. These green shades make me want to take my brushes immediately and go to the easel to create something with these shades or imagine a lake, hidden deep in the forests, with waters just as these greens - wouldn't it be devine to dive into those?