Under nicks on some corners. This is glass, not ceramic. There is no residue on the backside. Parallel ridges on back of tile, which is unmarked.
However, it is the wrong color of my current tile. It is a unique art-deco piece.I can take it to a local shipper for you. I still have the protective packing materials. You can take it to a glass cutter and get it to the size that you need. Good replaceable green tile, art-deco making a strong comeback. The item "Vintage Vitrolite 1930's Mint Jade Green Jadeite Bathroom Glass Wall Tile" is in sale since Thursday, September 3, 2020. This item is in the category "Antiques\Architectural & Garden\Tiles". The seller is "sherrstechman_0" and is located in Liberty, Missouri. This item can be shipped to United States.