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

This specimen is a transparent, round shaped, bi color parti sapphire weighing 2.18 carats, with measurements of 7.60 by 7.41 by 4.96 millimeters. The cutting style is faceted with a mixed brilliant cut, and the finish shows an excellent polish. Clarity is graded as very slightly included when evaluated at eye level, which in practice means the stone is essentially clean to the unaided eye, with only minor internal features that do not detract from its overall transparency or brilliance. Color intensity is described as intense, with a natural partitioning of tones that creates the parti effect. This sapphire is unenhanced, with no heat treatment, diffusion, or filling, and its reported origin is Ceylon, Sri Lanka. As corundum, this sapphire benefits from a hardness of nine on the Mohs scale and a refractive index in the typical corundum range, giving it exceptional durability and the ability to maintain polished facets and strong light performance over time. Pleochroism is a characteristic of many sapphires, and in parti sapphires this optical property, combined with color zoning formed in the crystal during growth, produces the distinct dual tones and attractive visual depth that collectors and connoisseurs seek.

When comparing this 2.18 carat Ceylon parti sapphire to historically famous sapphires, it helps to consider different pillars of value, namely color, clarity, provenance, and treatment status. The Star of India is well known for its extraordinary size and for being a star sapphire from Sri Lanka, yet it is silkier and more included than gem quality faceted sapphires. The Logan Sapphire and other museum stones are celebrated for their saturated blue hues and considerable scale, traits that command attention and historical prestige. Those examples highlight how size and a single pure color can create fame, while this parti sapphire demonstrates a different and increasingly prized form of rarity. Parti sapphires that show two distinct hues within a single crystal are less common in the high quality, transparent category, especially when they are untreated and exhibit intense color. A small number of historically important sapphires combine exceptional clarity and unique coloration, and collectors often value uniqueness and provenance as highly as sheer size. In this context, the mixed brilliant cut of this round sapphire is optimized to balance scintillation and color presentation, so the parti effect is presented attractively when set, rather than overwhelmed by excessive depth or poorly placed facets.

For the educated buyer, the value proposition of this gem is grounded in measurable, verifiable attributes. The carat weight and measurements place it in a highly wearable class for bespoke rings or pendants, and the nearly equal crown and pavilion proportions indicated by the depth measurement support a lively face up appearance. The clarity grade, evaluated at eye level as very slightly included, confirms transparency and makes the stone suitable for fine jewelry where a clean presentation is desired. Origin from Ceylon, Sri Lanka, is significant because Sri Lanka has a long recorded history of producing sapphires with particularly vivid and appealing tones, and because untreated stones from established sources generally command a premium in the marketplace. The absence of any enhancement means the stone presents natural color and zoning as formed in the earth, and for many collectors this authenticity is a primary determinant of long term value. Practical considerations also support the desirability of this sapphire. Its durability and polish make it suitable for daily wear when set responsibly, and the mixed brilliant cut will maximize brilliance while preserving the parti character, creating a dynamic appearance under varied lighting. At The Natural Sapphire Company we catalog and present gemstones with full transparency about origin, treatment status, and gemological characteristics, and we assist clients in selecting settings that both protect and showcase the stone. For buyers seeking a distinctive, untreated Ceylon sapphire that combines intense color, excellent polish, and a rare parti presentation in a well proportioned round that reads beautifully in jewelry, this 2.18 carat gem represents a compelling and collectible choice.