Yes, this is looking awesome! Way to go! Full points for week 3.
To polish these off, I’d love to see some extra work done on the color and potentially normal/bump maps. A larger scale gradient or noise of some kind would be helpful, and some smaller scale nicks, chips, and speckles would be awesome. Here’s some inspiration:
ArtStation – Stylized Rock, Shukar Parkin
ArtStation – Stylized Rock, Shukar Parkin
ArtStation – Stylized Rock???, Yunfei Li
These details could either be painted on or procedural adjustments to the current textures that are then baked to new image textures.