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What type of glass forms the surface and the core ? Do they have a different coefficient of thermal expansion ? and how hard is the surface ? - Rod57 ( talk) 19:02, 30 October 2014 (UTC) reply

Or maybe it's actually a Chemically strengthened glass.

Tell the Corelle Company Owner off the original Corelle with the economy style. This is so not what I wanted. I'm going to give it away. 174.255.65.10 ( talk) 18:23, 7 March 2022 (UTC) reply