Just an update on the "Paraiba Chalcedony": I just saw some of the first runs of precision, machine cut Paraiba Calcedony. They were in small sizes like 2.5mm rounds and they were hot! In the smaller sizes they look much more transparent than the larger sizes, like the one in the picture below. They were bright and lively and the color was gorgeous. They really did look like little Paraiba tourmalines!