This month's birthstone

View Cart    Checkout

Learn about Gemstones Tourmaline Color: wide color range, green, blue, yellow, pink, red, brown, colorless. Bi-color is common. Hardness: 7 - 7.5 Refractive Index: 1.61 – 1.66 Density: 3.01 – 3.25 Chemical Composition: (NaLiCa)(Fe11MgMnAl)3Al6((OH)4(BO3)3Si6O18) Crystal Structure: trigonal Origins: Brazil, Madagascar, Namibia, Zambia, Sri Lanka, Burma, Russia, USA, Afghanistan. Back

©2003-2010 Ceylon Gems.  All rights reserved.
Our Terms & Conditions.