A clear translucent chalcedony colored by trace impurities, such as manganese or iron oxides. Purple chalcedony is an uncommon tone and fairly expensive. Commercially it is called damsonite.
Purple chalcedony is a silicon dioxide mineral with a hardness of 7. It differs from Jasper in that the quartz is arranged in fibrous layers rather than the sugar-like grains found in Jasper.
Some purple chalcedonies have light banding, dendrites or other inclusions within them, such as the dendritic Amethyst Sage from Nevada.
Purple chalcedony is most often used in jewlry as cabochons and beads. Clear chalcedony is often dyed or heat treated it imitate purple chalcedony.
Purple chalcedony is found in Mexico, Brazil, Turkey and the USA.