0.82 Ct. Bi Color Sapphire from Ceylon (Sri Lanka)

This 0.82 carat round bi color sapphire presents a clear and balanced example of fine Sri Lankan gem material, offered by The Natural Sapphire Company. The stone measures 5.67 x 5.60 x 3.36 mm, and it is fashioned in a mixed brilliant cut to optimize light return while preserving the natural color zoning. Transparency is described as transparent, with a clarity grade of very very slightly included as evaluated at eye level, and a medium intense color intensity that conveys depth without overpowering the stone. Polish is excellent, supporting crisp facets and clean reflections, and the overall finish highlights both the round outline and the internal color separation. Enhancement heat treated, origin Ceylon Sri Lanka, cut proportions and surface condition are consistent with contemporary grading practices for faceted sapphires, and the combination of size, cut, clarity, and color intensity results in a gem that is measured, documented, and suitable for a variety of precision settings.

The narrative of this sapphire begins millions of years ago, at depths where heat, pressure, and rock chemistry converged to produce corundum crystals within the high grade metamorphic terrains of Ceylon. In those ancient conditions, aluminum rich host rocks reacted with migrating fluids and trace elements, particularly titanium and iron, which became incorporated into the growing corundum lattice. Variations in the local chemistry and the temperature regime during episodic growth produced the distinct bi color zoning observed today, as layers rich in different trace elements formed sequentially. Over geological time, uplift and erosion liberated these crystals from their host rock, concentrating them in alluvial gravels and river systems where the hardest, most durable crystals were selectively preserved. Subsequent recovery and careful lapidary work revealed the internal story, and precise cutting and controlled heat treatment were applied to stabilize and enhance the stone without obscuring its natural character. The result is a gem that carries both the geological history of Ceylon and the technical standards of modern gemcraft, presented with provenance and specification by The Natural Sapphire Company.