Linsoir Beads Natural Black Volcanic Lava Rock Beads 4 Sizes Assorted for Essential Oil Jewelry Making 1 Box Material: black lava stone,they are natural stone beads,size and color may have slight difference Bead Size: 4mm/6mm/8mm/10mm 4 sizes mixed; Hole Size: 0.5mm for 4mm and 6mm beads, 1.0mm for 8mm and 10mm beads Quality: 4mm-100pcs,6mm-100pcs,8mm-100pcs,10mm-40pcs,total is 340 pcs These lava stone beads have great texture and have been smoothed for an improved feel.Great for diffusser jewelry making Have a variety of sizes all together in one plastic box.Easy to maintain all beads and save you much time