12-40mm average. Don't you just love the color of these golden quartz beads? These are highly polished golden quartz picket beads. Each strand of these quartz beads is slightly graduated from 12-40mm and each bead is unique in shape and coloring. Quartz is known to be a very powerful stone and is often referred to as the Universal Crystal" because of its many uses. Quartz beads are said to enhance energy by absorbing, storing, amplifying, balancing, focusing and transmitting. Quartz also enhances thoughts and is known to be extremely beneficial for manifesting, healing, meditation, protection, and channeling. Surely, you could use some of these positive effects in your life!