Hemani Herbals - Herbal Henna Cone - Black (Each)Instant Color Easy Application Black Color THE TOUCH OF TRUE HERBAL. Made with the finest quality of henna leaves, our gel based black Herbal Henna Cones are brightly hued and give quick results. They come in convenient packaging and are easy to apply, leaving a cooling sensation behind that makes your hand feel fresh. If you want the henna to stay on for 1 2 days, leave the henna to dry for 5 10 minutes. If you want the color to last for a week,