This item appears to have  windows that are a mix of resin and glass because they are far too light weight to be actual glass and unlike actual glass they do not appear to be fragile.  It does not take away from the very striking and attractive appearance of this affordable  lamp.  My only concern is how the window material will hold up under the burning heat of full on sun in the South. I cannot attest to this as yet as they have only been in place 4 months.