51.30 Ct. Bi Color / Parti Sapphire from Ceylon (Sri Lanka)

This 51.30 carat faceted sapphire from Ceylon, certified by GIA and presented by The Natural Sapphire Company, is an emerald cut exhibiting a zoned greenish blue and yellow coloration. The stone measures 22.66 by 17.46 by 13.41 millimeters and is described in the laboratory report as Zoned Greenish Blue And Yellow. Its cutting style is a classic step-cut emerald shape, executed with precise facet junctions and symmetry that emphasize the stone’s bi-color character. Clarity is graded as eye clean at normal viewing distance, with vivid color intensity and an excellent polish, and the specimen has not undergone any enhancement. The overall presentation is one of substantial scale and control, with the pavilion and table proportions arranged to balance the two dominant color zones while preserving strong saturation and internal light return.

Inclusions, while not affecting the gem’s eye-clean appearance, serve as natural signatures and are part of this sapphire’s character. Under magnification, minor internal features such as growth zoning and minute crystal inclusions are apparent; these elements do not detract from transparency but instead provide diagnostic markers consistent with natural Ceylon material. Growth zoning contributes both to the visible partitioning of greenish blue and yellow and to subtle internal textures that interact with the cut to produce localized shifts in hue across the table and facets. The presence, orientation, and morphology of these internal features are useful for gemological identification and provenance confirmation, and they form a forensic map that correlates with the GIA report and untreated origin assessment. For clients and connoisseurs seeking a sizable, naturally zoned sapphire with secure documentation, this piece represents a precise combination of scale, color zoning, and natural internal character, all presented with the technical standards and provenance verification that The Natural Sapphire Company provides.