CA-MOON024LB-002-111

Natural Gems Belgium Certification : CA-MOON024LB-002-111

IDENTIFICATION : Natural Moonstone - tricolor adularescence - 4.315 ct - oval

Species : Natural Orthoclase (Anorthoclase)
Variety : blue Moonstone

DESCRIPTION

Shape & Cutting Style : Oval cabochon, polished both sides
Carat Weight :  4.315 Carat
Measurements : 13.2 x 9.1 x 4.4 mm
Color : milky white to clear with yellow, green and shades of 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
Small chip on flat side

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 milky white to clear with yellow, green and shades of blue adularescence moonstone is all natural, and it's cut grade is good, symmetry is fair, polish is fair, luster is good to very good.