1.86 cts OBSIDIAN SNOWFLAKE Africa. authentic With Certificate of Authenticity

authentic NAME OF THE OBSIDIAN STONE Natural Snowflakes
AVERAGE WEIGHT 1.86 carats
OVAL SIZE
DIMENSIONS 7.7 x 9.7 x 4.9 mm
COLOR Black & White
CLARTE Opaque
EXCELLENT CHANDELIER
ORIGIN Africa
DURATION 5-5.5
DENSITY 2.35-2.60
REFRACTION INDEX 1.45-1.55
TREATMENT Unheated
QUANTITY 1 piece(s)
REFERENCE 2013689A