FA-CROP024WH-001-084

Natural Gems Belgium Colored Stone Certification : FA-CROP024WH-001-084

IDENTIFICATION : Natural White Crystal Opal - play of color - 0.67ct - oval - unheated

Species : Natural Opal
Variety : White Crystal Opal

DESCRIPTION

Shape & Cutting Style : Oval , mixed cut
Measurements : 9.0 x 7.0 x 3.6 mm
Carat Weight : 0.67 Carat
Color : White equally split in yelowish 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 orangy yellow shine on the longest side, both sides display different 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 good.
polish grade is good ,cut grade is fair, it is oval shaped with fair to good symmetry, luster is good