Raw edge – glass edges which have not been treated and are as sharp as razors.
Seamed edge – Sanded down using a special tool. The edging is generally uniform and feels rough to the touch. The top edge, of most roll-down windows in a car is seamed.
Polished edge – Octagonal, perfectly smooth, perfectly straight edges. Herculite doors have polished edges.
Clamshell – damaged portion of the glass. An impact of some kind chipped the glass leaving the ‘clamshell’ looking area where the sliver broke off. The glass is damaged and will usually stand the test of time. Installing film on such glass is done with the complete understanding that installer is not liable if glass breaks. Not as scary as it sounds very rarely are there issues.