It's a beautiful natural faceted cut handmade blue color  tourmaline loose gemstone for jewelry from Afghanistan. All the pictures were taken by iPhone 8 plus in natural diffuse light.

Weight           :   6.50 CT 
Color             :   Blueish green
Cut                :   Emerald
Clarity           :   Slightly Included
Origin           :   Afghanistan
Stone            :  Tourmaline
Certificate    :   On buyer demand (buyer will pay the cost)
Treatment    :   none