Photo’s are way harder to do on granite than wood
Not half bad for a first attempt… 
Awesome 
Looks decent. Are you using a greyscale image or having to use a dithered image?
Have to dither grayscales failed hard for me
@Alex_Krause Thought that might be the case. I have similar failures with greyscales on leather. Even light power seems to make it just go black lol.
What dithering method do you use? Halftone might look better for this application.