
only found in east africa
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colors
available:
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medium green
deep forest green
grass green
yellow-green
mint green
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family/species:
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tourmaline
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properties:
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RI=1.624 (+/-0.005) - 1.644
(+/-0.006) DR
SG=3.06 (-0.05, +0.15)
dispersion= 0.017
hardness=7-7.5
note: suitable for use in jewelry
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treatments:
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none
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important
information:
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distinctively colored by chromium
and
vanadium
to give a beautiful range of green hues
100% natural with no known treatments or enhancements
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cuts:
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calibrated up to 6mm
all standard cuts
and free size
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rough:
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generally available in clean
material to
cut sizes 4mm and under; bigger pieces occasionally available - please
contact us for current stock
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mining:
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only found in kenya and tanzania
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