RO-TOUR025BG-002-433
Rough tourmaline - for faceting or rough gemstone jewelry - 1.739 ct - bluish green
Certificate: RO-TOUR025BG-002-433
Gem Type: Tourmaline
Weight: 1.739 Carat
Shape: Rough
Size: 9.0 x 4.6 x 4.0 mm.
Color: Bluish green (indicolite) (deep color)
Clarity: Transparent
Luster: N/A
Treatment: Unheated Untreated
Birefringence : 0.020
Crystallography : Hexagonal (trigonal)
Dispersion : 0.017
Luster : Vitreous
Hardness : 7
Refractive index : 1.62 to 1.64
Specific gravity : 3.02 to 3.26
