1.30 Ct. Bluish Green Sapphire from Montana

One beautiful transparent 1.30 carat oval shape bluish green sapphire awaits in this offering from The Natural Sapphire Company, presented with exacting measurements of 6.82 x 5.79 x 4.43 mm, and a mixed brilliant cut that has been executed to maximize both color and light performance. This sapphire has a clarity grade of very slightly included, evaluated at eye level, which to the practiced gemologist and informed buyer means that minor inclusions are present but do not compromise the stone beside its face up transparency and sparkle. The color is described as medium intense, a balanced saturation that reads as a refined bluish green, and the polish has been graded excellent, so each facet edge returns light with crispness and liveliness. The enhancement applied is heat treatment, a stable and widely accepted process in the trade that has been used to refine the tone and overall visual appeal of many natural sapphires, and the recorded origin is Montana, a source known for producing sapphires with unique tones and strong provenance.

To understand why this sapphire looks the way it does, it is useful to imagine the deep time and dynamic geological processes that created it. Corundum crystals formed as aluminum rich rocks were subjected to elevated temperatures and pressures in the earths crust, a process that in Montana took place over many millions of years during episodes of mountain building and volcanic activity. Aluminum atoms were encouraged to crystallize into the dense lattice we call corundum, while trace elements present in the surrounding environment influenced the final color. In the case of this stone, a mix of iron and titanium produced a bluish green hue, with the relative proportions of those trace elements setting the medium intense saturation that is so pleasing to the eye. Over geologic time, uplift and erosion liberated corundum crystals from their primary hosts, and weathering and stream action concentrated them into secondary gravels where many of Montanas finest material has been recovered. The journey from crystal growth to a cut gemstone that fits into a ring or pendant involved not only those vast natural processes, but also the subtle hand of human skill in recognizing, cutting, and refining the stone for aesthetic and practical use.

From a gemological standpoint the characteristics recorded for this sapphire communicate value in several specific ways that matter to an educated buyer. The 1.30 carat weight together with the oval outline and the proportions given by the 6.82 x 5.79 x 4.43 mm dimensions mean that the stone will read larger than a round of equal weight in many settings, while still remaining comfortable and versatile for everyday wear. The mixed brilliant cut is a deliberate choice that combines a brilliant crown pattern to enhance scintillation and a pavilion design that controls light return and color performance, so the face up color remains lively rather than lifeless. The clarity grade of very slightly included, evaluated at eye level, indicates that inclusions are minimal when viewed without magnification, a quality that preserves transparency and brilliance for the sitter and which collectors value because it requires less compromise between size and clarity. The medium intense color intensity hits a sweet spot for many connoisseurs, offering enough saturation to convey a genuine personality without becoming overly dark when set in jewelry, and the excellent polish ensures that facet junctions are clean and the overall visual presentation is premium. Heat treatment, disclosed and stable, is an enhancement that refines color and is an accepted practice when fully reported, it should be considered by the buyer as part of an informed trade vernacular rather than a diminishment of natural origin.

For the buyer who appreciates provenance, durability, and practical beauty, this Montana sapphire presents a compelling proposition. Montana is associated with sapphires that exhibit unique and often subtle color ranges, and collectors often prize the locality information as part of the gem story. The stone is hard and durable enough for daily wear, and its natural transparency combined with the excellent polish means it will perform well in a variety of settings. For a ring intended to show hue and brilliance, white metal settings such as white gold or platinum will emphasize the cooler aspects of the bluish green, while a warm metal may soften the tone toward a greener cast if that is desired. At The Natural Sapphire Company we prioritize full disclosure of treatments and origins, and we can provide further gemological documentation upon request. We can also advise on ideal mounting designs to protect and showcase the stone, including bezel styles for secure everyday wear, classic four prong designs for maximum light exposure, or custom settings that combine accent stones to complement the sapphire without detracting from its unique color. This sapphire is suited to buyers seeking a gemstone that combines geological narrative, measured gemological quality, and the kind of eye pleasing color that stands up to scrutiny, and we welcome your questions about certification, mounting options, and provenance verification.