2,23 ct Rubellite Tourmaline

Species ....................................................................... Natural Tourmaline
Variety .............................................................................................. Rubellite
DESCRIPTION
Shape & Cutting Style ................................................ Oval, Mixed Cut
Measurements ................................................. 9.70 x 6.85 x 4.67 mm
Carat Weight ............................................................................. 2.23 Carat
Color ................................................................. Vivid/Deep Purplish Pink
Transparency ......................................................................... Transparent
ADDITIONAL GRADING CHARACTERISTICS
Color Quality Grade ..................................... Extra Fine Color Quality
COMMENTS
Rubellite is commonly heated to improve its color. There
is currently no scientific method available to determine
whether this gemstone has been enhanced or not.

MAIN PROPERTIES OF TOURMALINE
Chemical Composition ........... Na(Li,Al)3Al6B3Si6O27(OH)3(OH,F)
Crystal System ........................................................................... Trigonal
Mohs Hardness ......................................................................... 7.0 - 7.5
Specific Gravity ...................................................... 2.84 - 3.40 g/cm3
Optical Character ..................................................................... Uniaxial-
Refractive Index ............................................................. 1.603 - 1.666
Birefringence ................................................................... 0.013 - 0.034