Perles en calcédoine entre 6 et 10mm Paire de boucles d'oreilles Treatments that exist to modify

Treatments that exist to modify common blue opal:

57 carats / Blue and yellow: 13

Size between 4 and 8mm

Couleur possible: Jaune à jaune foncé

Color: Light green to dark green zoning Shape: Drop Size: 29

Perles en calcédoine entre 6 et 10mm Paire de boucles d'oreilles Treatments that exist to modifyChalcedony beads. Color: Blue green Sizes between 6 and 10mm Country of origin: Mongolia Treatment: Contains colorless resin residues that are present in small fractures of the stone. The resin is intended to make the stone more resistant. This is called an accepted treatment because it does not change the appearance of the stone. Gemological information about chalcedony: Possible color: Red, orange, blue, green, white, gray, pink, brown Density: