TOURMALINETourmalines have a variety of exciting color, including the remarkable intense violet-to-blue gems particular to Paraba, Brazil, and similar blues from Africa. Favourite of mineral collectors.Tourmaline is a birthstone for October and also the gem of the eighth anniversary. Quality FactorsColor
![]() Tourmaline rainbow colors have a wide range of color intensity and tone.
Clarity
![]() Pink to red tourmaline often has more visible inclusions than green to blue varieties.
Cut
![]() Tourmaline crystals are often long, leading cutters to cut slender finished stones
Carat Weight
![]() Tourmalines come in all shapes and sizes. The value change for size varies with the variety.
1554Francisco Spinoza expedition discovers Brazilian emerald: the first recorded green tourmaline crystal. PYROELECTRICTourmaline becomes electrically charged when heated. Also when squeezed it piezoelectric too. PARAIBABrazilian source famous for vivid blue to green tourmalines colored by copper. |