This answer list for “Mineral that shimmers” is built from examples where the clue appeared in crosswords with similar language. Each entry has proven to be a fit in published puzzle environments.
Answers:
- MICA
Synonyms and Definitions
MICA
- Synonyms: isinglass
- Definition: These are specific minerals made up of hydrated silicates of elements like aluminum or potassium. They crystallize in a way that allows them to be perfectly split into extremely thin sheets. Due to their ability to resist electricity, they are often used as dielectrics.