Get inspired by the colors of the sea with these blue and green quartz 4mm round beads from Dakota Stones. Available by the strand, these beads display oceanic colors that vary from ocean blue and sea green to pale foamy green and brown. These beads are perfect for ocean-inspired jewelry. Quartz is the most common mineral found on the surface of the earth. It is said to be a stone of power and that it can enhance thoughts. These tiny beads are perfectly round in size and would make excellent spacers.