These are nicely polished, banded grey agate gemstone beads. These teardrop beads measure 8 x 20mm. Each of these banded agate beads is unique in color and pattern. Agate gem stone beads enhance creativity and strengthen the intellect, making them a beneficial stone for both students and artists. Agate is also known as a good luck gem stone, and a stone of harmony. Agate beads balance yin/yang energy.