"Lustrous as ice on a sunbeam," this pigmented glass can be used for structural applications or repurposed for a variety of projects. Over time "vitrolite" became a generic term for structural glass, but the originator is identified by the fine, parallel grooves on its back (to maximize grip). This panel has minor damage: a chip in a corner, the price has been docked to reflect that.

This page has some great background and history on the material, with foucs on its use in the DC area.
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