Black onyx is simple elegance that goes with everything! "Black onyx" is the trade name for a dark agate which has been dyed and heat-treated to a permanent black color. The briolette is a 12x8mm flat faceted teardrop. Austrian crystal accents. Super lightweight and minimalist. 2-1/8" (54mm) long from the top of the fish hook ear wires. All silver is oxidized sterling. Metaphysical properties: Black agate -- Brings forth visions in meditation and dreams. Reduces fever. 1st and 5th chakras. Zodiac birthstone for Leo July 23 - August 22. According to Vedic astrology, the birthstone for February. "Metaphysical properties" should not be taken as medical advice, or used as a substitute for medical care. This product does not claim to diagnose, prevent, or cure health issues. Information given is to explain the lore behind the stones and enrich the buyer experience. Gift-ready in either an organza bag (default) or gift box upon request. Packaging styles change with availability.