Richly colored tourmalines often have a surprise in store, as Nature has stacked a number of completely contrasting color on top of one another in the raw crystals. Multicolored tourmalines are pure individuality.
Formula: Na(Li, Al)3Al6B3Si6O27(OH)3(OH,F)
Hardness: 7 – 7.5
Density: 2.90 – 3.40 g/cm3
Refractive Index: 1.614 – 1.666 DR: 0.014 – 0.032
Color:
Pink-green, pink-colorless, blue-green
Countries of Origin:
Brazil, Madagascar, Mozambique, Nigeria, Sri Lanka
Birthstone: October