This is a beautiful all natural genuine anklet on an open link silver chain. The anklet has a gorgeous iridescence and flashes different colors from every angle. Each piece is unique and beautiful in it's own right.All gemstones have certain properties, here's what the ones in this anklet have:Onyx is an astrological gemstone many types of which are used as astrological substitutes for primary gemstones. For example Green Onyx is an astrological substitute for Emerald. ONYX gemstone is a type of Chalcedony which has parallel banded layers. The colors of the bands may range from white to many other shades like black, blue, green, red, red-orange, orange, honey etc. The various varieties of Onyxes are used for Astrological as well as healing purposes.