Saferly Gentian Violet Piercing Marker Gentian violet helps wounds and cuts to heal quickly. The primary agent used in the Gram stain test; Gentian Violet is perhaps the single most important identification test in use today. It is also used by hospitals for the treatment of serious heat burns and other injuries to the skin and gums. Typically prepared as a weak solution in water it is painted on skin or gums to promote healing. In Body piercing gentian violet is commonly used to mark the location for placing piercings including surface piercings.