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

Color            :  Lagoon
Cut               :  Cushion
Size              :  9.5 x 6 x 4.2 mm
Clarity          :  Moderately included 
Weight         :  2.00 ct
Origin          :  Afghanistan
Stone           : Tourmaline
Certificate   :  On buyer demand (buyer will pay the cost):
Treatment   :  none