FA-CROP024WH-001-083

Natural Gems Belgium Colored Stone Certification : FA-CROP024WH-001-083

IDENTIFICATION : Natural White Crystal Opal - play of color - 3.07 ct - oval - unheated

Species : Natural Opal
Variety : White Crystal Opal

DESCRIPTION

Shape & Cutting Style : Oval cabochon, polished both sides
Measurements : 12.0 x 9.7 x 6.0 mm
Carat Weight : 3.07 Carat
Color : White with rainbow play of color opaliscence
Transparency : Transparent
Origin: Ethiopia

Birefringence : none
Crystallography : Amorphous
Dispersion : Very low
Luster : Iridescent
Hardness : 6-6.5
Refractive index : 1.37-1.47
Specific gravity : 2.10

COMMENTS :

Optical Effect : Opaliscence ( White-Red-Orange-Green-Yellow-Violet-Blue )

no indications of heating, no indications of other treatments

Personal Note From Natural Gems Belgium:

This crystal opal is a white opal with a split orange to baby blue shine, displaying a clear and entertaining play of color as the stone is moving. the color grade is good to very good, due to the Red-Orange-Green-Yellow-Violet-Blue Flashing Opaliscence that is very pronounced.
polish grade is good to very good, it is oval shaped with fair to good symmetry, luster is very good