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.
Answer: AVL files are GIS Files primarily associated with ArcView Theme Legend File (ESRI). AVL files are also associated with Unknown Apple II File (found on Golden Orchard Apple II CD Rom), Video Fun File and FileViewPro. Additional types of files may also be using the AVL file extension.