We have two styles of this vibrant blue stone: 12mm hearts and 10mm faceted round beads. Chalcedony is not its own mineral species, but rather a form of quartz in microcrystalline form. These beads have a strong turquoise color, reminiscent of Amazonite or Arizona Turquoise.See the 12mm in the Items that go with... Price is per strand. Quantities are limited and they will not go to the site on March 1, 2025.