This object is a frosted egg-shaped art glass paperweight featuring a clear "peekaboo" window with blue controlled bubbles and gold aventurine flake inclusions. Similar vintage pieces typically sell online ranging from $20 to $60 depending on the maker and condition. 

Design Features

• Frosted Body: Matte outer finish covering the egg.

• Clear Window: A polished oval porthole revealing the interior.

• Controlled Bubbles: Distinct elongated blue bubble trails.

• Gold Flakes: Sparkling gold aventurine flecks suspended in the center.