Faceted 4mm tanzanite interspersed with sterling silver from Turkey. I generally wear this bracelet nestled between at least two other bracelets -silver, ruby, green apatite are all excellent combinations that I have in stock. I started making stretch bracelets in March of 2022, and am totally hooked. I hope you will be, too. These bracelets are easy to take on and off (though I leave them on all the time). This bracelet measures about 7" (medium), but can be made larger or smaller. Questions about sizing? Please measure your wrist where you'd like to wear the bracelet or email Julie@CarnelianKnoll.com for help.