noun, masculine/ʒwa.jo/plural: joyaux
joyau is masculine in French.
jewel (valuable object for ornamentation)
“On aurait juré que chacune de ses paroles était un joyau.” — You would have sworn that each of his words was a jewel.
Backformed from Old French joyaus, plural of joyal, variant of jouel, from Latin iocale.