Cool tip about the polarization. As far as visual ID, I don’t know about the borosilicate that was used for a kitchenware, but borosilicate can appear green, c

Cool tip about the polarization. As far as visual ID, I don’t know about the borosilicate that was used for a kitchenware, but borosilicate can appear green, colorless or slightly yellowish. It depends on the formulation and impurities in the batch – for instance, iron causes the green color. This varies between Kimax and Pyrex and Duran used for labware and art. One could also distinguish this glass by using the index of refractivity. Glass will disappear when put into liquid with the right refraction. You can make a formula with a refractive index that matches a known glass and then compare. I’d post links but I’m on a very slow connection.