Orange 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 Another very rare color of the tourmaline family is orange and brownish orange. Enhancements Orange tourmaline is not enhanced. More information on gemstone enhancements. 1995-2000 Gem Hut. All rights reserved.