Perles en opale commune jaune entre 6 et 10mm Sizes:8mm 513 nβ = 1

513 nβ = 1

40gPoids en carat: 117 caratPays d'origine: MadagascarInformations gemmologiques sur la septaria:

rétablit tous les 90°

brittle Cleavage: Along the faces of the octahedron Polariscope: Isotropic

Perles en opale commune jaune entre 6 et 10mm Sizes:8mm 513 nβ = 1Common yellow opal beads. Color: More or less light yellow with inclusions Sizes between 6 and 10mm Country of origin: Tanzania Gemological information about common yellow opal: Note: There are two types of opal: noble (also called precious) and common. Common opal is distinguished from noble opal by its construction. Silica nanospherules are: Either of a different shape other than that of a sphere Either too big Either of different diameters from