The cylindrical open ended Tamburo wall sconce has minimal hardware to show off the beautiful stone-textured glass. ADA-Compliant. Our Opal Stone glass is a white blown glass with an outer texture of coarse sandstone. Inspired by the elements of nature, the appearance of the surface resembles the beautiful cut patterning of a rock formation. The soft white color can suit any modern or classic dcor. The smooth satin finish on the clear outer layer is a result of an extensive etching process. This blown glass is handcrafted by a skilled artisan, utilizing century-old techniques passed down from generation to generation. Each piece of this dcor has its own artistic nature that can be individually appreciated.