What's That Rock?Muscovite mica
Also called: mica
A shiny, silvery mineral that peels into thin, flexible, see-through sheets.
How to identify Muscovite mica
- Peels into very thin, bendy, springy flakes
- Soft: a fingernail can scratch it
- Glittery in rocks like granite and schist
Often confused with
Is Muscovite mica valuable?
Inexpensive.
What changes the price
- Common mineral: low value
- Large, clean, flexible mica books are inexpensive collector pieces
- Sheets are sold for crafts and electronics
Uses
- Electrical insulation
- Glitter-like additive in cosmetics and paint
Care
Sheets are fragile and flake. Handle gently.
Identifying a stone from a description or a photo is an estimate. Many stones look alike. Ask an expert or a gem lab before you buy, sell or rely on an identification.
Updated October 2026