Pyroceram (ceramic glass) is designed for stove doors (not fireplace doors) and fireplace doors that seal with gasket. It is only available in clear but has a thickness of 3/16" and can be ordered in different shapes.
Tempered glass is lower temperature glass used for fireplace doors that have to be opened when burning. It can be only be made in a rectangular shape, but can also be ordered in multiple thicknesses and in your choice of tints.
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