RO-TOUR025BG-002-450

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