This gem is a violet variety of quartz. Amethyst used to be as valuable as diamonds, but an extensive deposit was discovered in Brazil. Purple is traditionally the color of royalty and since the dawn of history amethyst has been used to adorn the rich and powerful monarchs and rulers.
Vapor4Life recently came out with a ton of new drip tips, in all different colors and styles. There are photos of all the drip tips on the website. Each different style shows the various colors next to each other. This works great if you have decided on a style, and then want to choose a color, but if you happen to want a particular color, and don’t mind too much about the size and shape, then you can look here.