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

This is a single, translucent 42.44 carat rough bi color parti sapphire, measuring 32.67 by 13.31 by 11.45 millimeters, offered by The Natural Sapphire Company. The stone presents a natural parti color character, with distinct zones of tone that create visual complexity and depth, and it displays medium color intensity with a pleasing soft saturation. The surface shows an excellent polish even in its rough state, which enhances surface luster and gives a clear indication of how the material will respond to lapidary work. Clarity is graded as very slightly included, evaluated at eye level, which means that inclusions are minimal and do not significantly interrupt the gem s translucency or overall aesthetic when viewed without magnification. Importantly for collectors and connoisseurs, this sapphire is natural with no enhancement, and it is of Ceylon origin from Sri Lanka, a source renowned for producing some of the world s most desirable corundum specimens.

For an educated buyer, these technical details matter because they speak directly to the stone s potential and value. The sizable 42.44 carat rough allows multiple cutting pathways, and the parti color characteristic makes this material particularly well suited to cabochon cutting or creative freeform faceting that preserves the color zoning. Typical weight loss during cutting for corundum can range from thirty percent to sixty percent depending on the desired final shape and the need to remove inclusions or unwanted zoning, so this rough could yield a substantial single stone or several smaller finished stones depending on the cutter s objectives. The very slightly included clarity grade indicates that inclusions are likely to be limited to small crystal inclusions or mild growth zoning that will not detract from translucency, and the excellent surface polish shown on the rough suggests that the material will take a high quality finish. Corundum s hardness of nine on the Mohs scale ensures excellent durability for jewelry use, and the untreated nature of this Ceylon sapphire enhances both its rarity and its long term value.

From a market perspective, untreated Sri Lankan parti sapphires of this size are uncommon and attract interest from collectors, designers, and investors alike because they combine provenance, natural color phenomena, and a substantial rough weight that offers flexibility in finishing. The parti color adds artistic and design value because it allows lapidaries and jewelers to create pieces with dynamic color shifts that cannot be replicated by heat treatment or synthetic processes. The fact that this sapphire has not been enhanced increases its desirability in premium markets where traceability and natural state command a price premium. At The Natural Sapphire Company we can advise on optimal cutting strategies to preserve the most attractive color zoning, recommend reputable laboratories for documentation when required, and discuss bespoke settings that highlight the stone s unique character. If you would like detailed cutting estimates, potential finished sizes, or further photographic angles for assessment, our team is available to provide expert guidance and to facilitate the next steps in turning this rare Ceylon parti sapphire into a finished gem or a prized collection specimen.