I have no idea. I have cookware from Walmart and it is just fine. I suppose the expensive kind is better quality and will last for generations.
Silicon bakeware is great...Bit I'm not sure what else? The article in my sources seems to have some good suggestions?
Sorry but there are rather more than two classes of lustre in mineralogy. Adamantine as in diamond and minerals with high R.I. Metallic as in gold Pearly as in moonstone Resinous as in some garnets Silky as in satin-spar Vitreous glass like as in qua...