1 Stone countertops, including granite, other natural stone and quartz resin (engineered stone) cost $4-$150 per square foot, or $120-$4,500 for a typical 30 square foot kitchen countertop. 2  Stone tiles cost $4-$20 per square foot; slab stone countertops cost $50-$150 per square foot.
STL (STereoLithography) is a file format native to the stereolithography CAD software created by 3D Systems. STL has several after-the-fact backronyms such as Standard Triangle Language and Standard Tessellation Language.
MTL files are commonly accompanied by and referenced from OBJ files that define geometry upon which the materials of the MTL file are mapped. The MTL format, although still widely used, is outdated and does not fully support later technologies such as specular maps and parallax maps.TL files are commonly accompanied by and referenced from OBJ files that define geometry upon which the materials of the MTL file are mapped. The MTL format, although still widely used, is outdated and does not fully support later technologies such as specular maps and parallax maps.