Marmertafel - Logo Design

I really like to do branding, but I am fairly new to it. A friend of mine started this company a couple years back, but after a while he wasn't happy anymore with the old logo he had. This is what I came up with for his business and he really liked it (luckily haha). I'm working on a detailed Behance post to explain my design thoughts and rationales.

But please let me know what you think, and what I can do to improve my branding skills 😊And if you like it, please hit that lovely "L" button for me!