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

This sapphire is a transparent, bi color parti stone, weighing 1.37 carats, with exact dimensions of 6.66 x 6.62 x 4.13 mm. It is cut into a round shape, using a faceted, mixed brilliant style that blends a brilliant facet arrangement on the crown with step or modified facets on the pavilion to optimize scintillation and return of light. The clarity is graded as eye clean at normal viewing distance, which indicates an absence of inclusions visible to the unaided eye, and the polish is excellent, producing sharp facet junctions and a consistent reflective finish. Color intensity is described as light, and the parti characteristic produces distinguishable color zones that interact with light and viewing angle to create subtle shifts in hue and character.

The material originates from Ceylon Sri Lanka, a region with a long established history of producing well formed corundum crystals with attractive clarity and color. Importantly, this sapphire has no enhancement, meaning the stone has not been subjected to heat treatment or other laboratory processes to alter color or clarity. For collectors and connoisseurs, untreated provenance is a significant attribute, because it documents the stone as an intact natural specimen rather than a modified product. The parti or bi color quality is a natural result of trace element distribution and growth zoning within the corundum matrix, and the mixed brilliant cut has been executed to present these zones in a balanced and aesthetically pleasing manner, maintaining both color interest and optical performance.

As corundum, sapphire rates nine on the Mohs hardness scale, a level of durability that supports use in a wide range of jewelry types intended for regular wear, including rings, pendants, and bracelets. The round mixed brilliant cut used here is inherently robust, with a symmetrical girdle profile and a pavilion design that protects against chipping when properly set. Care recommendations are straightforward, due to the stone being untreated and structurally stable, and include periodic gentle cleaning with warm water and mild soap, using a soft brush to remove surface debris, and avoiding exposure to strong acids or abrasive cleaners. Professional inspection of the setting at intervals will help ensure prongs and mountings remain secure, and an experienced jeweler can advise on the suitability of ultrasonic cleaning once the stone is set, with attention to any inclusions that might affect soundness.

The combination of documented origin, untreated state, measured proportions, and enduring material properties are the primary factors that enable this sapphire to be regarded as a generational heirloom. An heirloom piece benefits from clarity of provenance, stable natural condition, and the capacity for reworking without loss of intrinsic value. This sapphire meets those criteria, with verifiable dimensions and a no enhancement disclosure provided by The Natural Sapphire Company, which supports transfer of reliable information from one generation to the next. Over time, the parti character will continue to offer a distinct visual identity, while the durable corundum structure will retain polish and facet integrity when cared for appropriately. For preservation of value and story, it is advisable to maintain written documentation of origin and treatment, to obtain a professional appraisal that records the stone specifications, and to store and insure the piece with the same diligence applied to other family heirlooms.