Bead, tourmalinated quartz (natural), 8mm round, B grade, Mohs hardness 7. Sold per 15-1/2" to 16" strand. - Fire Mountain Gems and Beads
World Wide Gems Beads Gemstone Green Tourmalinated Quartz Faceted Cube- 7 Inch Long Strand -Stones Measure- 7-8mm Code-HIGH-8211 : Amazon.co.uk: Home & Kitchen
Large Green Tourmalated Prehnite Quartz Chip Beads: MrBead.co.uk
AA Tourmalinated Quartz Smooth Round Beads ~ Various Sizes ~ 15.5" Strand