1.22 Ct. Bi Color / Parti Cabochon Sapphire from Montana

This listing describes one translucent 1.22 carat round bi color or parti sapphire, with dimensions 6.00 by 5.94 by 3.00 mm, cut as a cabochon. The cutting style is a traditional domed cabochon, the dome height of 3.00 mm producing a pronounced high profile relative to the 6.00 mm diameter, which enhances internal color separation and soft light return. Color intensity is light, exhibiting distinct parti zoning with yellow green and bluish green sectors that shift subtly with orientation, a characteristic behavior of Montana sapphires. Clarity is graded included, evaluated at eye level, with visible internal features that give the stone a natural character and create internal reflections under direct light, the translucency permitting diffuse transmission rather than facet sparkle. The surface finish presents an excellent polish, the lapping and final buffing producing a smooth, glassy exterior that accentuates the cabochon dome. The stone has been heat treated, a standard enhancement to improve tone and clarity in sapphires, and its provenance is Montana, which accounts for the specific parti coloration and crystalline habit.

From a lapidary and setting perspective, this cabochon benefits from a high dome geometry that emphasizes color zoning and internal structure, making bezel or low prong settings preferable to protect the girdle and preserve the polished surface. The combination of a 3.00 mm dome and the included clarity means the piece reads as an organic, characterful specimen suitable for collector grade jewelry or as a study stone for connoisseurs. As corundum, sapphire retains a hardness of 9 on the Mohs scale, ensuring good wearability when mounted correctly, while the heat treatment applied is stable under normal wear conditions, though care should be taken to avoid exposure to extreme thermal shock or aggressive chemicals. At The Natural Sapphire Company we highlight the technical attributes that matter to experienced buyers, including cut geometry, apparent color zoning, polish quality, treatment disclosure, and origin, providing an accurate basis for appraisal, design selection, and long term care. This Montana parti cabochon will appeal to those seeking a finely finished, natural character stone with clear, documented attributes for bespoke jewelry or collection.