5.15 Ct. Blue Sapphire from Ceylon (Sri Lanka)

One beautiful transparent 5.15 carat pear shape blue sapphire is presented with exact dimensions of 12.74 x 9.83 x 5.66 millimeters, and these measurements define both its face up presence and its internal optical behavior. The stone displays a mixed brilliant cut, with a carefully proportioned crown and a pavilion that together yield a depth ratio of approximately 50 percent, a balance that preserves generous face up spread while allowing sufficient pavilion volume for controlled light return. The pear outline offers a larger apparent size along the length axis compared with a round of the same weight, and the elongated profile increases its versatility for custom settings. Transparency through the body of the sapphire is excellent, so that the 5.15 carat weight reads clearly when viewed table down, and the combination of dimensions and weight produces a visual scale that is uncommon at this size for Ceylon material.

At the facet level the mixed brilliant approach on this sapphire blends small, precise triangular and kite facets on the crown with broader, slightly stepped pavilion facets, a configuration chosen to manage dark color intensity while maximizing scintillation and pattern contrast. Facet junctions are crisp and symmetry is tight, attributes that speak to attentive lapidary technique, and the overall polish is excellent, permitting high fidelity transmission of light and minimizing surface diffusion. The clarity grade is assessed as very very slightly included at eye level, and the minor inclusions are internal, discrete, and positioned so that they do not interfere with the stone s primary window of color or its structural integrity. Heat treatment has been applied, a standard and stable enhancement for sapphire which optimizes blue saturation and reduces absorption in select zones without compromising hardness or durability. Origin is Ceylon Sri Lanka, a source noted for sapphires that range from velvety to vivid blues, and in this piece the dark color intensity is refined rather than muddy, showing rich saturation with controlled tone that suits larger weights particularly well.

The 5.15 carat weight itself is the central driver of this sapphire s rarity and value, because supply of clean, well cut Ceylon sapphires at this scale is constrained, and pricing generally escalates faster than linear as carat weight increases. In practical terms a gem at this weight moves from commonly available sizes into the territory of notable stones, where provenance, cut quality, and color grade become decisive value differentiators. The pear shape amplifies perceived size, and when paired with the mixed brilliant cutting strategy the stone offers an optimal balance of face up area and depth driven color saturation, characteristics sought by collectors and designers who need both presence and optical refinement. For setting considerations the depth ratio and pavilion design support either a classic prong gallery that showcases the table, or a tailored bezel that secures the pointed end while preserving light entry at the crown. The Natural Sapphire Company stands behind the selection and grading of this sapphire, and we can provide bespoke mounting suggestions that respect the stone s proportions and optical orientation, ensuring that its 5.15 carat presence is presented to full advantage in any commissioned piece.