CA-MOON024RB-002-164

Natural Gems Belgium Certification : CA-MOON024RB-002-164

IDENTIFICATION : Natural Moonstone - rainbow adularescence - 7.535 ct - marquise cabochon

Species : Natural Orthoclase (Anorthoclase)
Variety : Rainbow Moonstone

DESCRIPTION

Shape & Cutting Style : Oval cabochon, polished both sides
Carat Weight :  7.535 Carat
Measurements : 20.7 x 6.9 x 6.7 mm
Color : milky white mixed with clear with rainbow adularescence (yellow orange red, greenish blue, greenish yellow , shades of green,shades of blue)
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 fissures in stone
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 mixed with clear with rainbow adularescence (yellow orange red, greenish blue, greenish yellow , shades of green,shades of blue) moonstone gemstone is all natural, and it's cut grade is fair to good, symmetry is fair to good, polish is fair, luster is good to very good.