Geo is a simple, contemporary sconce featuring handcrafted opal glass. Use indoors or out. ADA-compliant. Besa Lighting opal glass is a soft white cased glass that can suit any classic or modern decor. Opal has a very tranquil glow that is pleasing in appearance. 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.