Check out Crystal Set rock with orange and crystals Low-poly 3D model on CGTrader for $21. High-quality mesh by GizemDilaraTek: 152 polys, 78 vertices. PBR, Textured, UV Mapped.
OBJ (OBJ, filesize: 44 MB), BLEND (Blender, filesize: 44 MB), FBX (Autodesk FBX, filesize: 44 MB)