For your consideration is an 81.8ct piece of Sky Blue Topaz rough.
 
NOTES:
This stone is a classic Sky Blue Topaz color. Great clarity, these will cut clean gems. 
 
*Please refer to the photos/video for color and clarity details.
 
Mineral: Sky Blue Topaz
Origin: Brazil
Weight: 81.8 ct
Dimensions: 31.5mm x 21.5mm x 15.5mm
Clarity: Clean
Treatment: Irradiated