Natural Gemstone Stretch Bracelets, with Lava Rock Beads and Brass Spacer Beads, Abacus and Round, Faceted, Size: about 54mm(2-1/8 inch) inner diameter, bead: 8mm in diameter.âPlease Note: These Gemstone may include Natural Blue Spot Jasper, Amazonite, Dalmatian Jasper, Labradorite and so on(as the picture shows). but as it is a mixed product, the stone type is delivered randomly, please refer to the actual product delivered.