Isinglass is a type of MICA, a group of minerals that are composed of hydrous potassium aluminum silicate. It is a transparent, colorless material that is used in the production of various products, such as glues, adhesives, and insulation materials. Isinglass is also used in the brewing industry as a fining agent to clarify beer and wine. It is also used in the food industry as a clarifying agent for jellies and jams.