Rough tourmaline - for faceting or rough gemstone jewelry - 3.927 ct - greenish blue
additional light used to indicate clearness and colors
Certificate: RO-TOUR025BG-002-450
Gem Type: Tourmaline
Weight: 3.927 Carat
Shape: Rough
Size: 13.6 x 7.4 x 5.3 mm.
Color: greenish blue/bluish 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
