0.66 Ct. Bluish Green Sapphire from Montana

This transparent 0.66 carat bluish green sapphire measures 6.45 by 5.56 by 1.74 millimeters, and presents as a fancy shaped step cut with a hexagonal outline. The color is described as bluish green with medium color intensity, and the stone has been evaluated as slightly included at eye level. The surface finish is of excellent polish, and the sample has received standard heat treatment to stabilize and enhance tone. The origin is Montana, which is consistent with the cool teal to bluish green hue and with the typical crystal habit that yields clean step cut geometry. The shallow pavilion depth of 1.74 millimeters gives a generous face up spread for 0.66 carat, which enhances visual presence in a ring or pendant, while the slightly included clarity grade means small natural features are present but the gem remains transparent and lively. At The Natural Sapphire Company we document these technical parameters to aid in selection and in planning a custom mounting that complements the gem geometry and character.

The cutting style is a classic step cut, executed in a series of broad parallel facets on the crown and pavilion. The step cut emphasizes color planes and directional luster rather than scintillation, producing a hall of mirrors effect when the parallel facets reflect light back through the table. In a sapphire with medium intensity bluish green color, the step cut produces zones of more saturated blue green near the facet junctions, and paler areas across the table depending on light angle, which is a desirable optical interplay for collectors and designers who appreciate subtlety. The excellent polish maximizes specular reflection off the facet planes, preserving crisp facet junctions and sharp outline definition. The heat treatment performed on this Montana sapphire is a stable enhancement that improves hue uniformity and reduces color zoning, while leaving natural inclusions intact. The slightly included grade at eye level indicates features such as pinpoint crystals or small needles that are inherent to natural stones from primary deposits, and these features can contribute to origin identification while minimally affecting structural integrity.

From a setting and craftsmanship perspective the stone warrants custom design decisions that acknowledge the step cut geometry and the shallow depth. The broad table and shallow profile favor low bezel settings or platform bezels that protect the girdle and reduce the risk of chipping while maintaining a sleek silhouette. Prong settings are feasible, but should use low, substantial prongs positioned at facet junctions or at the midpoints of the hexagonal sides to avoid concealing the interesting step pattern and to keep the stone seated securely. Channel or bar settings are practical for a linear design such as a band or bracelet, where the flatness of the pavilion allows tight tolerance seating and minimal elevation above the metal. Because the step cut emphasizes color rather than sparkle, surrounding accent stones are best chosen to enhance perceived color depth and to create a controlled contrast. The slightly included clarity can be accommodated by placing accent elements strategically, for example by aligning a major prong over a peripheral inclusion that might otherwise draw attention, or by introducing a halo of small brilliant cut diamonds that read as a continuous bright field against which the sapphire color reads stronger.

For pairing and custom design, consider combinations that leverage the step cut geometry and bluish green coloration. A halo of high quality brilliant cut white diamonds will increase apparent color saturation by contrast, and the scintillation of the brilliants will complement the step cut luster without competing with the sapphire face up planes. For a more colored palette, small oval or cushion cut yellow sapphires with medium to strong saturation create a warm contrast that accentuates the green component, while delicate pink or peach sapphires produce a modern, tonal juxtaposition with subtle complementary effects. Step cut side stones such as tapered baguettes or hexagonal step cut sapphires echo the central stone geometry, creating architectural continuity in a three stone ring or in a pendant with flanking accents. Metal choice influences perception as well, with platinum or 18 karat white gold reinforcing a cool, crystalline presentation, and with 18 karat rose gold or warm yellow gold warming the overall appearance and lending the bluish green a softer, teal like quality. At The Natural Sapphire Company we can advise on facet to facet alignments, bezel lip thickness, and prong profiles that will preserve the excellent polish and the hall of mirrors effect, while accommodating the slightly included clarity and the shallow pavilion depth. If you would like a technical sketch or a CAD mockup showing relative scale and proposed gemstone pairings, we can prepare a detailed plan to ensure the final piece realizes the optical potential of this Montana sapphire.