Danburite – A crystalline mineral similar to Topaz. Danburite is generally colorless, but can sometimes have a yellow, brown or even pink hue. Pink Danburites tend to be the most expensive of the different colors. Danburite is named for their first discovery in 1839 in Danbury, Connecticut. The deposits in Danbury are inaccessible today, leaving Mexico as the top source for Danburite crystals, though they can also be found in Japan, Russia and Madagascar.