Check out Chinese Gold Ingot 3D model on CGTrader for $40. High-quality Polygon mesh mesh by aceimagedesign: 2379165 polys, 1311095 vertices. Textured, UV Mapped.
STL (Stereolithography, filesize: 43.1 MB), OBJ (OBJ, filesize: 34.7 MB), MAX (Autodesk 3ds Max, filesize: 54.8 MB), FBX (Autodesk FBX, filesize: 60.7 MB)