Usage patterns
宝石を身につけるto wear a gem/jewelry
She always wears a small gem on her.
宝石が輝くfor a gem to sparkle/shine
The gem on the ring sparkled in the light.
〈物〉に宝石をはめ込むto set a gem into something
A large gem was set into the ring.
宝石を鑑定するto appraise a gem
An expert appraised this gem.