This tourmaline is from the Congo & was part of a parcel of rough tourmaline ethically sourced through our block supply chain & was hand cut by Alan Poultney.
 
The tourmaline:
 
Invent No: APD402P 0007
 
Estimated weights colours & clarities
Estimated weight: 3.36cts
Cut: trilliant modified criss-cross cut
Estimated Colour: transparent green
Colour  Distribution: even
Hue: medium/dark
Tone: medium/dark
Estimated Clarity: EC (Eye Clean)
Brilliance: 95%
Girdle: Polished
Dimensions: 10.12mm x 9.29mm x 6.56mm    
                           (Length x width x depth)
Refractive Indices: 1.610  -  1.698
Specific Gravity: 2.82-3.90
Hardness: 7 - 7.5
Orign: Congo Africa
Treatment: No eveidence of heat treatment