This is a millefiori art glass paperweight featuring multicolored floral canes set in a clear glass dome, commonly attributed to mid-to-late 20th-century Italian (Murano) or general European production. 

About Millefiori Glass

• Name Origin: Italian for "thousand flowers".

• Technique: Multicolored glass rods (canes) are heated, stretched, and sliced to reveal intricate floral patterns inside.

• Value Range: Typically sells between $20 to $100 depending on size, maker marks, and complexity.