Rough tourmaline - for faceting or rough gemstone jewelry - 2.478 ct - deep green verdelite
additional light used to indicate clearness and colors
Certificate: RO-TOUR025BG-002-445
Gem Type: Tourmaline
Weight: 2.478 Carat
Shape: Rough
Size: 7.5 x 5.5 x 5.4 mm.
Color: deep green
Clarity: Transparent
Luster: N/A
Treatment: Unheated Untreated
Birefringence : 0.020
Crystallography : Hexagonal (trigonal)
Dispersion : 0.017
Luster : Vitreous
Hardness : 7
Find the online certificate here
