Vulcanite Heishi Beads Black 5mm (30" Strand) Made of Vulcanite, and sometimes recycled phonograph records made of Vinyl (a form of Vulcanite) these thin, heishi style beads create a unique style to any bead stringing project. You might be wearing the Beatles, Elvis or even Sinatra when you create a Necklace or Earrings with these ultra cool Beads. Size: 5mm Beads per strand: 765 (approximately) Hole size: .75mm Color: Black