0.66 Ct. Bluish Green Sapphire from Madagascar

This Madagascar origin sapphire presents as a transparent, oval shaped gem weighing 0.66 carat, with dimensions 5.87 by 4.87 by 2.57 millimeters. The measured depth is approximately 2.57 millimeters, equating to roughly 47.9 percent of the average diameter, a proportion that yields balanced face up spread while preserving pavilion volume for light return. Cut as a mixed brilliant, the pavilion exhibits a combination of shallow step facets and a central brilliant constellation, while the crown retains a traditional brilliant facet arrangement, producing a lively mix of scintillation and broad flash. The hue reads bluish green with intense color intensity and a medium to slightly dark tone that shifts subtly toward blue or green depending on viewing angle, indicating pleochroic behavior common to corundum. At eye level the clarity is graded slightly included, meaning small natural inclusions are visible under casual inspection but do not significantly interrupt the gem s overall transparency or light performance, and the excellent polish ensures crisp facet junctions and minimal surface abrasions, maximizing brilliance and saturation. The sapphire has been heat treated, a stable and industry standard enhancement that improves clarity and color saturation, and its origin from Madagascar contributes to its distinctive teal leaning hue and fine crystalline structure.

From a lapidary and setting perspective, this oval mixed brilliant invites designs that exploit its facet architecture and depth profile, the nearly 48 percent depth supporting both prong and low bezel approaches while maintaining lively reflectance. Because the crown retains brilliant facets, orienting the stone table up with four or six narrow prongs will maximize crown facet exposure and scintillation, while a low bezel with a thin polished rim can offer protection to the girdle and pavilion without overly muting light performance, provided the bezel is fitted to the exact 5.87 by 4.87 millimeter footprint. The slightly included clarity grade suggests careful pavilion mapping during setting, to avoid trapping airflow or mounting material in obvious inclusion sites, and to maintain structural security in daily wear. The mixed brilliant pavilion produces combined broad flashes and pinpoint scintillation, therefore designers should consider complementary accent stones with similar optical activity, such as melee brilliants, to harmonize sparkle scales, or step cut side stones if the intent is to contrast the sapphire s scintillation with geometric flash. The excellent polish means facet junctions will sit flush against bezel walls or prong tips, simplifying precise calibrations for custom seats and minimizing rework.

For custom jewelry pairings, there are several technically satisfying directions that highlight the bluish green tone and intense saturation of this sapphire. For high contrast and maximum brilliance, set the oval as a center with a single row halo of small white round brilliant diamonds in a tight pave, using platinum or 18 karat white gold to cool the metal and favor the blue side of the hue, the diamonds providing high dispersion that enlivens the sapphire s flashes without competing for color. For color resonance and botanical character, flank the center with matched round or trillion cut tsavorite garnets of 0.15 to 0.25 carat each, their vivid green saturation amplifying the green component and producing a tonal trilogy ring, a 18 karat yellow or rose gold mounting will warm the sapphire slightly and create a vintage palette with complementary warmth. For a modern asymmetrical pendant, consider a staggered composition of this oval sapphire with a single pear shaped aquamarine or teal tourmaline on one side, and a cluster of small rose cut or rose tone diamonds on the other, the mixed facet relationships creating dynamic interplay between broad flashes and soft glow. For everyday wear, a secure four prong gallery in low profile configuration will preserve the mixed brilliant s light return while protecting the girdle, and for a more sculptural engagement design, twin tapered baguette diamonds set horizontally can emphasize the oval s length and lend architectural contrast. At The Natural Sapphire Company we can source matched melee, select tsavorite or diamond pairings, and work to exact specifications for prong count, bezel thickness, and seat tolerances to ensure the 5.87 by 4.87 by 2.57 millimeter sapphire sits precisely, performs optimally, and integrates with the chosen accents to meet both aesthetic and technical requirements.