Natural yellow and blue Winton Matrix Boulder Opal - 16.91 ct - free form cabochon - unheated - queensland
The striking combination of yellow and blue in this Natural Matrix Boulder Opal, weighing 16.91 ct, is a testament to the beauty and rarity of this gem. Sourced from Queensland, this free form cabochon is unheated and Natural Gems Belgium guaranteeing its natural and authentic qualities. As a collector's item, this opal radiates luxury and sophistication, making it a valuable addition to any jewelry collection.
Natural Gems Belgium Colored Stone Certification : FA-OPPC024WH-001-002
IDENTIFICATION
Species : Natural Opal
Variety : Boulder Opal
DESCRIPTION
Shape & Cutting Style : Free form cabochon, polished both sides
Measurements : 21.2 x 14.5 x 7.6 mm
Carat Weight : 16.91 Carat
Color : Brown covered blue green yellow purple
Transparency : Opaque
Origin: Queensland
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 (Iridescent)
no indications of heating, no indications of other treatments
Personal Note From Natural Gems Belgium:
This natural winton matrix boulder opal is a good example of Iridescence in boulder opal, showing mainly violet blue and orangy yellow tones.
polish grade is good, it is free form shaped, luster is good, displaying fair to good color
FIND THE ONLINE CERTIFICATE HERE
for general impression take a look at the pictures
All items are sent insured with track and trace regardless of value
