A medley of blue chalcedony cabochons. The largest one is quite big- definitely cocktail ring sized- at 36.23 carats and measuring 24x18mm. Yummy! The other two blue chalcedony cabs are wonderful as well. One is 12.09 carats and measures 17x12mm. The other weighs 6.33 carats and measures 14x10mm. Positioned on a gloved hand to give an idea of size.