Wholesale Prices in Price Matrix, The black glass beads come on a 16" strand of appx 100 beads per strand. Pictures do not do these beads justice when it comes to showing the brilliance of color. The almost look like black onyx beads. The beads are made from glass and are a top grade quality #1 bead. Bead size: 4mm. You can mix the SIZES with the 8mm and 6 mm black glass beads to achieve the price break quantities. To do this, you need to order the quantities & types individually. Your invoice will be adjusted to the correct price bracket amounts before billing. This will be reflected on your invoice (but not during the checkout process). Great item for your jewelry, beading, craft projects.