1.00 Ct. Yellow Sapphire from Ceylon (Sri Lanka)

This transparent 1.00 carat oval yellow sapphire presents precise proportions and gemological integrity, supplied by The Natural Sapphire Company. The oval measures 6.79 by 5.46 by 3.32 millimeters, yielding a depth of 3.32 millimeters which translates to an approximate depth of 54.2 percent relative to the average of the length and width, a dimensional balance that favors both table presence and pavilion return. The stone has been fashioned in a mixed brilliant cut, combining a brilliant facet layout on the crown with a complementary pavilion geometry to optimize light return and face up brilliance. The color is described as light in intensity, a delicate yellow that reads as lemon to pale canary depending on light source, and the transparency is high, allowing clean passage of light through the stone. Clarity is graded as very slightly included at eye level, indicating small internal features that are minute and non distracting to the unaided eye, and the surface presents an excellent polish that enhances scintillation and facet definition. The sapphire is natural and untreated, with no enhancement, and is sourced from Ceylon Sri Lanka, a provenance noted for producing clean crystals with attractive pastel tones.

The mixed brilliant faceting is central to the gemological performance of this yellow sapphire, the crown facets being arranged to produce broad flashes of white light and micro scintillation, while the pavilion faceting is tuned to return light efficiently through the table, preserving color saturation without darkening the center. The cutter has employed a conventional oval facet map with symmetrical pavilion mains and well aligned crown star and bezel facets, a combination that controls leakage and maximizes face up brightness. Given the refractive index range of corundum, the facet angles are critical, and this specimen demonstrates careful angle selection with no apparent windowing or extinction under standard viewing. The table appears proportionate to the overall dimensions, providing a stable focal plane for observers, and the girdle profile is even and suitable for secure mounting. These cutting considerations result in an optic that balances brilliance, dispersion and color, producing lively movement in direct and diffused illumination.

Inspection of internal characteristics shows fine needle and crystal inclusions that are typical of natural Ceylon material, positioned and sized such that they do not interrupt brilliance or structural integrity. Because inclusions are very slight at eye level, the clarity contributes positively to the perceived luster without imparting cloudiness or shadowing. The excellent polish is evident on facet junctions and girdle treatment, which minimizes surface microabrasion and supports sustained reflectance over time. The absence of enhancement means the color vector and internal fabric are original to the crystal, an attribute that appeals to discerning buyers who value natural tone stability and untreated provenance. Craftsmanship reflects experienced lapidary work, with symmetry and facet alignment indicating careful preform orientation, likely chosen to exploit the favorable crystallographic axis for color distribution and to mitigate natural zoning that can occur in corundum from the region.

As a gemological material corundum rates nine on the Mohs hardness scale, providing excellent resistance to abrasion for daily wear, and toughness that is generally good because sapphire lacks easy basal cleavage, meaning the risk of catastrophic cleavage in normal use is low. The combination of hardness and structural integrity makes this 1.00 carat oval yellow sapphire particularly suitable for rings, pendants, and bracelets that are worn regularly, provided the mounting offers reasonable protection at vulnerable points. For maximum longevity in ring applications a low profile bezel or well engineered prong setting will protect the girdle and pavilion from hard knocks, and periodic professional cleaning and inspection will preserve the polish and secure the setting. Because the stone is natural and unheated, it does not carry treatment sensitivities that can complicate cleaning, yet standard care protocols for corundum should be followed, avoiding severe blows and exposure to harsh chemicals. The Natural Sapphire Company stands behind the sourcing and detailed evaluation of this sapphire, and our team can advise on optimal settings and care to ensure this Ceylon yellow sapphire performs beautifully for everyday use.