That’s a pretty stone @elianafranzenburg! What type is it?
You mentioned you where having trouble with your exposure. (I know the feeling! Lol.) Since it’s a stationary object you should be able to position your camera on a tripod or other stable object allowing you to be able to lengthen your shutter speed considerably. Then you could lower your ISO to something more like 100 which would give you a higher quality image. I wouldn’t think you’d need quite a large aperture either – maybe try something more like f/4? I’m not in the situation, but I’d try something like that if I was shooting it. 🙂 Maybe stepping back from your object a tad would help it all to be in tack sharp focus. Nice photo! 🙂