Why is muscovite also known as 'isinglass'?

A combination of the green mica and the veins or base material forms a rock which is also called Mariposite, and it is sometimes used as an ornamental stone. ... cosmetics. Large Muscovite sheets were also once used for oven windows ("isinglass") due to their ability to withstand high temperatures and keep the heat inside. read more

Translucent sheets of muscovite were once used as windows for furnaces, ovens, lanterns, etc. where the extreme heat might be too much for the glass available at the time. read more

More properly known as muscovite, isinglass is a form of mica that is often found in sheets. The sheets are often very thin, transparent, and somewhat elastic in nature. Russia and India have been the site of mining sheets of mica on an ongoing basis. read more

Muscovite (also known as common mica, isinglass, or potash mica) is a hydrated phyllosilicate mineral of aluminium and potassium with formula K Al 2 (AlSi 3 O 10)(FOH) 2, or 2 (Al 2 O 3) 3 (SiO 2) 6 (H 2 O). read more