ulexite
/juːˈlɛksaɪt/
noun
- A soft, white mineral that can transmit images along its fibers, sometimes called 'TV rock'.
- The museum displayed a polished piece of ulexite that showed letters through its surface.
- She used a slab of ulexite to project an image of a coin onto the table.
- Geologists found ulexite in the dry lake beds of the Mojave Desert.