Frog painted on rock

I painted this for a friend but she didn't seem too enthusiastic about seeing me so i'm gonna sell it instead.
I found it at Gorges du Verdon/Verdon Gorge in France.
It was the last rock of the day, my knees were already shattered. Shouldn't have took it really cos i already had a bag full and kept telling myself to stop looking at rocks. But i saw this one and it looked good to paint. I thought if i carry it in my hand it wont add to the weight, but i was only lying to myself.