The sizes of these natural smokey quartz beads range from 16-20mm. Stunning beads! 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. These smokey quartz beads are a transparent yet medium smoke color.