The size of these beautiful beads is 12mm x 16mm. Back by popular demand! These A grade smokey quartz olives are highly polished. Smokey quartz is known as the stone of power. It provides a shield against psychic attacks, emotional and environmental stress, and is used extensively in healing and meditation. Smokey quartz was named after its smoke color, but smokey quartz can range in color from light grey to deep earthy smoke brown.