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: APD502P 0004
 
Estimated weights colours & clarities
Estimated weight: 10.63cts
Cut: shield modified crisscross cut
Estimated Colour: transparent orange
Colour  Distribution: even
Hue: dark
Tone: dark
Estimated Clarity: EC (Eye Clean)
Brilliance: 98%
Girdle: Polished
Dimensions:  14.79mm x 14.31mm x 9.56mm.  (Point to Point)
                           (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 evidence of heat treatment