cooperite

[ koo-puh-rahyt ]

/ ˈku pəˌraɪt /

Save This Word!

noun

a mineral, sulfide and arsenide of platinum, occurring in igneous rocks in the form of steel-gray crystals.

QUIZ

WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?

Smoothly step over to these common grammar mistakes that trip many people up. Good luck!

Question 1 of 7

Fill in the blank: I can’t figure out _____ gave me this gift.

Origin of cooperite

After R. A. Cooper, who described it in 1920; see -ite¹