precious stone

US /ˈpreʃ.əs stoʊn/
UK /ˈpreʃ.əs stoʊn/
"precious stone" picture
1.

a valuable mineral or rock, such as a diamond, ruby, or emerald, used in jewelry and for other ornamental purposes

:
The crown was adorned with many beautiful precious stones.
She inherited a necklace with a rare precious stone.