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Bi-Color Tourmaline

the best of both worlds in any light!
 
colors available:  

many attractive combinations available

green/red, green/pink

blue/red, blue/pink

peach/pink, peach/brown

pink/red, light pink/dark pink

light peach/dark peach

family/species:   tourmaline, elbaite
properties:   RI=1.624 (+/-0.005) - 1.644 (+/-0.006) DR
SG=3.06 (-0.05, +0.15)
dispersion= 0.017
hardness=7-7.5

suitable for use in jewelry

pyroelectric - becomes electrically charged when heated
piezoelectric - becomes electrically charged when squeezed
many modern higher-end hair dryer use tourmalines in them to prevent static!
treatments:  

none

important information:  

usually colored by iron and/or titanium and manganese, but also by color centers within the crystal structure
can be 100% natural with no treatments or enhancements, or heated, or irradiated
and heated (heat treatment or irradiation is not common for bi-color tourmalines)

(see policy on Treatment Disclosure)

stone colors can be described in percentage (%) terms, e.g. 60% green 40% red
birthstone:  

october

anniversary:  

8th

cuts:   calibrated up to 8mm
all standard cuts
and free sizes
rough:   generally available in clean material to cut sizes 6mm and under; bigger pieces occasionally available - please Contact Us for current stock
mining:   found in brazil, nigeria, mozambique, zambia, afghanistan, usa, and other localities worldwide

Photo Gallery: Selected Bi-Color Tourmalines

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