Question

which item is made using the mineral fluorite as part of the process?
○ kitty litter
○ watches
○ optical microscopes
○ steel and aluminum

Explanation:

Fluorite (calcium fluoride, $\text{CaF}_2$) has excellent optical properties, including low dispersion and high transparency to visible and ultraviolet light. This makes it suitable for manufacturing precision optical components like lenses in optical microscopes. Kitty litter typically uses clay or silica gel, watches rely on metals/glass, and steel/aluminum production does not use fluorite as a key input for the final product.

Answer:

optical microscopes