FA-MOON024SB-002-146

Natural Gems Belgium Certification : FA-MOON024SB-002-146

IDENTIFICATION : Natural Moonstone faceted - slight bluish adularescence - 4.789 ct - Cushion

Species : Natural Orthoclase (Anorthoclase)
Variety : Moonstone

DESCRIPTION:

Shape & Cutting Style : Cushion, mixed cut
Carat Weight :  4.789 Carat
Measurements : 12.0 x 10.1 x 6.9 mm
Color : Clear to slight white with slight blue adularescence 
Transparency : Transparant
Clarity: Comparable to I1
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
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 to slight white with slight blue adularescence moonstone is all natural, and it's cut grade is good to very good, symmetry is good to very good, polish is good , luster is good.
Only higher quality of moonstone is used for faceting