RO-TOUR025BG-002-435
Rough tourmaline - for faceting or rough gemstone jewelry - 0.669 ct - bicolor
Certificate: RO-TOUR025BG-002-435
Gem Type: Tourmaline
Weight: 0.669 Carat
Shape: Rough
Size: 9.5 x 2.3 x 2.1 mm.
Color: Bicolor (bluish green and greenish blue) (verdelite + indicolite)
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
