Kunzite has two perfect cleavage directions. It’s pleochroic, with the best colour visible when you look down the length of the crystal. Cutters keep these factors in mind when they orient gems for finishing. They might also cut a kunzite deep to emphasise its pink to violet colour.
It is not unusual to find kunzite in large sizes. The Smithsonian Institution houses a faceted heart-shaped kunzite that weighs 880 carats.
Kunzite can be irradiated and then heat-treated to enhance its colour. Both treated and natural colour in kunzite can fade with exposure to heat and bright light.