On 2014-11-08, Whirled Peas > wrote:

> of the piece from the top. If it appears greenish, it's tempered glass.
> If it appears yellowish, it's the original borosilicate glass. I don't
> know if this is true or not.

I jes looked at my Chinese made CorningWare French White casserole
dishes (round) and they look mostly white. I see ZERO trace of green
(or yel) at all angles under all lights (incand, fluor, LED). My
guess is, yer ol' wives tale is no more than that.

nb