0.58 Ct. Bi Color Sapphire from Madagascar

This parcel-quality, transparent bi-color sapphire presents as a marquise cut of 0.58 carats with exact dimensions of 6.02 x 4.16 x 3.09 millimeters. The stone is fashioned in a marquise outline with a mixed brilliant facet arrangement, combining the light performance of brilliant cutting with complementary step facets to emphasize depth and color distribution. Clarity is described as very very slightly included when evaluated at eye level, indicating inclusions are minimal and do not interrupt the gem’s overall transparency or brilliance under normal viewing conditions. Color intensity is graded as medium intense, and the stone exhibits a natural bi-color character with pleasing transitions between green and blue tones across the body of the gem. Polish is excellent, producing crisp facet junctions and strong facet reflections that enhance the marquise silhouette and the internal play of color.

From a gemological standpoint this sapphire is notable for being untreated, with no enhancement applied to alter color or clarity. The absence of heat treatment or other enhancements is an important quality attribute because it preserves the original crystal chemistry and makes the stone desirable for collectors and clients who prioritize natural material. The mixed brilliant cut is well suited to this weight and shape, balancing scintillation and face-up color saturation while retaining a comfortable profile for setting in rings, pendants, or bespoke pieces. The very very slightly included clarity grade allows for good light return without the visual distraction of prominent inclusions, and the excellent polish ensures maximum interaction with light. Photographs supplied for scale demonstrate the stone’s appearance mounted on the hand, illustrating how the marquise outline and bi-color effect read in wearable dimensions and how the stone sits relative to finger size.

The origin of this sapphire, Madagascar, contributes significantly to its character and market value. Madagascar has emerged over the past three decades as a source of a wide spectrum of sapphire colors, including parti and bi-color material, and certain regions such as Ilakaka and Sakaraha are widely recognized for producing stones with distinctive zoning and lively color palettes. Geological conditions in Madagascar create variable trace element distributions within corundum crystals, which in turn produce the multi-hued or zoned appearance seen in this piece. For many buyers and collectors, documented origin provides provenance that supports both aesthetic appreciation and long-term value, because material from established localities with known supply histories is easier to trace and appraise. Additionally, untreated Madagascar sapphires are relatively scarce compared with the larger volumes of heat-treated material on the market, so an untreated bi-color stone from this locality often carries a premium attributable to its natural state and geographic provenance.

The Natural Sapphire Company provides this sapphire with full disclosure of its characteristics and can supply independent documentation or additional imagery upon request to support sourcing and appraisal. Given its dimensions, cut style, and pleasing bi-color presentation, the stone is suitable for a refined, low-profile setting that allows light to enter from multiple facets, or alternatively for a bezel or partial-basket mount that protects the pointed ends typical of the marquise shape. Buyers seeking a distinctive, naturally colored sapphire will value the combination of transparent material, modest inclusions, excellent polish, and the verifiable Madagascar origin. For custom setting considerations, paired stones, or certification options, The Natural Sapphire Company can provide guidance rooted in gemological practice and in the company’s direct sourcing experience.