Definition of precious stone in English English dictionary
Any gem, such as a diamond or ruby, that is expensive because of its rarity or desirability; especially one set into a piece of jewelry
A precious stone is a valuable stone, such as a diamond or a ruby, that is used for making jewellery. = gem. Any of several gems, including the diamond, emerald, ruby, and sapphire, that have high economic value because of their rarity or appearance. a rare and valuable jewel such as a diamond or an emerald semi-precious