CA-MOON024LB-002-137

Natural Gems Belgium Certification : CA-MOON024LB-002-137

IDENTIFICATION : Natural Moonstone - light blue adularescence - 4.160 ct - oval cabochon

Species : Natural Orthoclase (Anorthoclase)
Variety : blue Moonstone

DESCRIPTION:

Shape & Cutting Style : Oval cabochon, polished both sides
Carat Weight :  4.160 Carat
Measurements : 11.0 x 9.0 x 4.9 mm
Color : clear with milky white with slight yellowish and light blue adularescence 
Transparency : Transparant
Hardness : 6.0
Birefringence : 005–0.006
Crystallography : monoclinic
Luster : Opalescent - Vitreous
Refractive index : 1.520-1.525
Specific Gravity : 2.56-2.59

COMMENTS :

No indications of heating, no indications of any other treatment
natural fissure in gemstone
Adularescence is caused by the diffraction of light as it hits thin, alternating layers of orthoclase and albite within the gem. This produces the appearance of a floating, cloud-like, blue to white light inside the gem. A blue sheen is produced if the albite crystals are very fine. 

Personal Note From Natural Gems Belgium:

This clear with milky white with slight yellowish and light blue adularescence moonstone is all natural, and it's cut grade is fair to good, symmetry is fair, polish is fair , luster is good.