Gas bubble in a large cavity filled with blue lead glass in a Lead glass filled cobalt doped blue Sapphire - Composite Sapphire


Crystal surrounded by an iridescent discoid fracture in heated Sapphire


Colour concentraction on the edges of the facets and natural inclusions in Ti-Heated natural Sapphire. Photo by Monica Renna and Salvo Castelli


Melted crystals with signs of recrystallization in Beryllium treated Sapphire

Lead Glass Filled

Growth structures in lead glass filled Ruby cabochon

Flux Healed

Flux and melted crystals in flux healed Ruby

Other treatments

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