Three Stone Bluish Green Sapphire Ring 2.58 Ct., Platinum 950

This ring centers a GIA certified greenish blue, bluish green sapphire, weighing 2.58 carats, in an oval mixed brilliant cut, with dimensions 8.89 by 7.72 by 4.73 millimeters, eye clean clarity at normal viewing distance, vivid color saturation, and an excellent polish, enhancement by heat treatment, origin Montana. The sapphire is flanked by white oval natural diamonds totaling approximately 0.40 carats, graded F in color and VS1 to VS2 in clarity. The mounting is executed entirely in platinum 950, using a classic three stone prong setting that elevates the center gem for optimal light return while securing the side stones.

In terms of durability, the sapphire benefits from corundum hardness at nine on the Mohs scale, which makes it highly resistant to everyday scratching and suitable for continuous wear when properly set. The heat treatment applied to this Montana sapphire is standard practice and is stable and permanent under normal wearing and cleaning conditions. The diamonds, at ten on the Mohs scale, contribute strong surface hardness, while their VS clarity grades indicate minimal inclusions that would otherwise act as stress concentrators. The use of platinum 950 for the ring offers superior longevity compared with many alternative metals, due to platinum's greater density, resistance to wear, and tendency to retain metal around prongs rather than thinning away, which translates to long term security for the stones.

Compared with similar three stone rings on the market, this design delivers a balanced combination of exposure and protection. Bezel set designs provide maximum security but reduce visible surface area of the center stone, while lower purity or softer metals such as sterling silver, or certain yellow or rose gold alloys, can wear faster and require more frequent maintenance, including rhodium re plating for white gold. The prong profile and construction in platinum 950 on this ring are more robust than typical 14 karat or 18 karat gold prongs, reducing the likelihood of premature thinning or deformation. Routine care including periodic professional inspection of prongs, cautious handling to avoid heavy knocks, and professional cleaning will preserve the piece over decades. The Natural Sapphire Company provides documentation and guidance for care and servicing, ensuring the technical attributes of this sapphire and the platinum setting are maintained.