4.28 Ct. Green Sapphire from Montana

This transparent green sapphire weighs 4.28 carats and presents a carefully proportioned fancy shape with overall dimensions of 10.30 by 9.40 by 6.30 millimeters, cut in a mixed brilliant pavilion and a faceted crown that balances scintillation and face up presence. The stone exhibits a medium intense green color that shows depth without appearing overly dark, and the tone is well suited to both contemporary and classical jewelry styles. Clarity has been evaluated as very slightly included at eye level, which means the stone reads clean to most observers while retaining natural internal features that attest to its geologic origin. The polish has been graded excellent, allowing the facets to return light crisply and contribute to the gem s overall liveliness. This sapphire is heat treated, a standard and stable enhancement used to refine color and clarity without compromising structural integrity, and the recorded origin is Montana, a source known for producing uniquely colored green and teal sapphires with a distinct regional character. The stone is offered by The Natural Sapphire Company.

Technically the mixed brilliant cut and the given proportions produce a pleasing combination of scintillation and broad flash, allowing the sapphire to exhibit both lively facet play and a clean, even color distribution across the table. At 6.30 millimeters in depth the gem has sufficient pavilion height to promote return of light, while the table and crown faceting contribute to a balanced visual spread for the stated carat weight. The very slightly included clarity grade indicates that natural features are present but not intrusive, and when combined with the excellent polish the result is a gem that photographs well and performs attractively in jewelry. As corundum, sapphire rates nine on the Mohs hardness scale, providing excellent daily wearability for rings, pendants, and other types of settings when mounted and cared for in the usual manner for fine colored gemstones. Heat treatment is noted and documented, and it is a widely accepted practice for sapphires that improves the gem s appearance in a stable and permanent way.

Compared to lab grown sapphires there are material differences to consider that extend beyond price points and availability. Lab grown sapphires offer consistency in color and clarity, and they can be produced rapidly with predictable specifications. Natural sapphires, such as this Montana green, are the product of unique geological conditions and crystallization histories that produce subtle variations in color zoning, pleochroism, and internal character that cannot be perfectly duplicated in a laboratory. These natural attributes are often valued by collectors and connoisseurs because they provide provenance, individuality, and a record of geologic time. In addition natural stones from a named locality carry implications for rarity and historical interest, and many buyers prefer the traceability and storytelling that come with natural origin. Heat treatment in natural sapphires is a controlled and accepted method to enhance appearance, and when disclosed it preserves the stone s authenticity while delivering improved color and clarity.

For those considering this sapphire from The Natural Sapphire Company the gem represents a combination of aesthetic quality and natural provenance. It is well suited to a bespoke setting where the subtle green tone and mixed brilliant faceting can be showcased, and its dimensions and weight offer a prominent face up appearance without excessive depth. We recommend independent laboratory documentation if formal certification is desired for insurance or appraisal purposes, and we can provide additional detailed photographs and measurements on request to assist with design planning. The combination of medium intense color, very slightly included clarity at eye level, excellent polish, and Montana origin provides a clear profile for buyers who value the natural character and long term appeal of mined sapphires.