0.66 Ct. Blue Sapphire from Madagascar

This 0.66 carat round blue sapphire exemplifies precision cutting and natural material integrity, with exact measurements of 4.96 x 5.00 x 3.24 mm, a mixed brilliant cut, and a clarity grade recorded as very very slightly included, evaluated at eye level. The gem presents a transparent body with medium intense color intensity, and an excellent polish that underscores facet definition and surface finish. Origin is Madagascar, and the stone is untreated, with no enhancement, a provenance detail that materially affects both aesthetic value and market desirability. The combination of a nearly perfectly round outline and mixed brilliant faceting yields an average diameter of 4.98 mm and a depth to diameter ratio of approximately 65 percent, a proportion that sits squarely within the preferred range for round sapphires when balancing light return and color saturation.

From a lapidary and optical perspective the mixed brilliant cut is chosen to reconcile competing priorities, namely lively scintillation and concentrated color. The crown exhibits a brilliant facet arrangement that disperses and returns white light and flashes of spectral fire, while the pavilion retains characteristics of stepwise shaping that helps to concentrate the blue hue within the stone rather than leaking it away. This structural strategy is particularly effective on material of medium intense color intensity, because it allows the viewer to perceive color depth without sacrificing the dynamic sparkle that a brilliant style produces. The excellent polish appreciably enhances facet junction crispness and minimizes surface diffusion of light, thereby maximizing contrast between bright facets and darker facet windows. In practical wear the sapphire displays the subtle pleochroic behavior typical of corundum, with slight shifts in tone and depth as the stone is rotated under light, which adds perceived complexity and visual interest without compromising overall evenness of color.

Owning this Madagascar blue sapphire is both an aesthetic acquisition and an assertion of craftsmanship, especially when presented by The Natural Sapphire Company. The absence of heat or other enhancements is a significant factor for connoisseurs and investors, because untreated natural sapphires of good color and clarity are relatively scarce compared with heat treated material. The durable nature of corundum, with its inherent hardness and resistance to abrasion, ensures that the excellent polish and precise facet architecture will endure as long as appropriate care is taken, making this gem a practical choice for daily wear settings as well as heirloom pieces. From an investment standpoint the stone combines desirable attributes, including an optimized depth ratio that enhances the perceived size and brilliance, a mixed brilliant cut that balances brilliance with saturated tone, and a clarity grade that indicates minimal inclusions visible only under magnification. For the client seeking an intelligently cut, naturally sourced sapphire that reflects both geological pedigree and artisanal finishing, this piece represents a measured investment in beauty and workmanship, an object that will read as refined and thoughtful in both contemporary and classic jewelry contexts, and a gem that will reward close inspection with consistent optical performance and provenance backed confidence.