ZENstore fine Shungite Knotted Shamballa Handmade Bracelet with Certified Gemstones, L 8-9", Gift Box Real gemstones: fine Shungite 2,19 g/cm3. Certificate of Authenticity form independent PRIN Institute Wien Best fit for wrist size 8 to 9 inches; Can be resized up to 13 inches Beads size 0.4 inches Other sizes also available Handmade