The gem cannot be polished without friction, nor man perfected without trials.
— Confucius

A gem cannot be polished without friction, nor a man perfected without trials.
Chinese Proverbs gem quote

Candor is the brightest gem of criticism.
— Benjamin Disraeli

A store of grain, Oh king is the best of treasures. A gem put in your mouth will not support life.
— Hitopadesa

If instead of a gem, or even a flower, we should cast the gift of a loving thought into the heart of a friend, that would be giving as the angels give.
— George Macdonald