ZENstore fine Shungite Knotted Shamballa Handmade Bracelet with Certified Gemstones, M 7-8", Gift Box Real gemstones: fine Shungite 2,19 g/cm3. Certificate of Authenticity form independent PRIN Institute Wien Best fit for wrist size 7 to 8 inches; Can be resized up to 12 inches Beads size 0.4 inches Other sizes also available Handmade