Yellow Tourmaline Gemstones Hardness 7.0. Tourmaline and opal are the birthstones of the month of October.
Tourmaline is the national gemstone of the United States.
Appearance Colored yellow, tourmaline of this variety is very rare. Enhancements Yellow tourmaline is not enhanced. More information on gemstone enhancements. 1995-2000 Gem Hut. All rights reserved.