CA-MOON024LB-002-096

Natural Gems Belgium Colored Stone Certification : CA-MOON024LB-002-096

IDENTIFICATION

Species : Natural Orthoclase (Anorthoclase)
Variety : Blue Moonstone

DESCRIPTION : Natural Moonstone - blue adularescence - 3.925 ct - round - certified natural

Shape & Cutting Style : Round cabochon, polished both sides
Carat Weight : 3.925 Carat
Measurements : 9.8 x 9.6 x 5.2 mm
Color : milky white to to almost clear with pale blue to 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

adularecence not this pronounced if no sunlight

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 Moonstone - blue adularescence moonstone gemstone is all natural, and it's cut grade is fair to good, symmetry is poor, polish is good, luster is good.