Looking for help with old cut glass tray

I bought this glass tray at a thrift store several years ago and thought it looked very old. It's about 9" x 11", weighs 2.5 lbs. (1135 gr), and has kind of an uneven/wavy surface on the inside bottom (the outside bottom looks like it was ground flat, but is kind of uneven/wavy on the smooth parts). The edges are sharp, so I'm thinking it's cut glass and maybe was used as a dresser tray or for sweet treats. Any help would be appreciated. ? Does anyone know the origin and how old it might be?