0.85 Ct. Greenish Blue Sapphire from Montana

From the glacial terraces and riverbeds of Montana, a single crystal began its slow journey, shaped by time and earth, until it was carefully recovered by skilled hands and brought to the bench. This transparent greenish blue sapphire weighs 0.85 carat, and measures 5.58 x 5.58 x 3.70 mm, a compact treasure whose color reads as a medium intense hue that shifts with every turn. The stone was heat treated to enhance its natural tone, a common and stable enhancement that brings clarity to the gem without taking away from its origin story. At eye level the clarity grade is very slightly included, a subtle fingerprint of nature that attests to authenticity while allowing the gem to remain bright and lively, and the polish has been executed to an excellent standard, producing a silky surface that welcomes light.

The cutter chose a mixed brilliant cut for this round gem, a geometry that marries a brilliant faceted crown with a precisely angled pavilion, creating a complex map of facets that work together to maximize light play. The geometry of the facets has been calculated to channel incoming light through the table, reflect it off pavilion facets, and return scintillation and flashes that dance across the surface. Because the crown facets are cut with careful symmetry and the pavilion facets meet at a central culet area with crisp alignment, the result is lively brilliance, thoughtful dispersion of subtle spectral flashes, and a balanced scintillation that reads beautifully both in daylight and under artificial lighting. The mixed brilliant approach gives this Montana sapphire a modern, versatile fire, while retaining a depth of color that speaks to its natural roots.

At The Natural Sapphire Company we love to pair such a stone with designs that honor both its origin and optical performance, settings that allow light to enter from the sides and bottom so the mixed brilliant geometry can do its work. This 0.85 carat round greenish blue stone will sit elegantly in a solitaire, halo, or three stone ring, and its modest dimensions make it perfectly suited for daily wear or an heirloom piece. For collectors seeking a piece that traces its story from rugged Montana terrain to the precise angles of a master cutter, this sapphire offers provenance, performance, and the quiet poetry of a gem that has been coaxed into brilliance.