inclusions synth. Korund

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Diagnostic curved colour-zoning in Flux-melt (Verneuil) method synthetic Ruby.
Two-phase primary flux-filled cavities in a Douros synthetic flux ruby.
Each of the twin flux grown synthetic ruby crystals has a rounded blue sapphire seed crystal at its center. Typical inclusions of platinum and primary and secondary flux inclusions are also present. Magnification 10x
Rain-like stringers of flux particles in synthetic ruby-Kashan
Inclusions
Curved striae clearly visible in this flame fusion synthetic ruby.
Curved color banding in altered synthetic verneuil blue sapphire rough