115.63 Ct. Yellow Rough Sapphire from Ceylon (Sri Lanka)

This is a singular, translucent, 115.63 carat rough shape yellow sapphire from Ceylon Sri Lanka, presented by The Natural Sapphire Company. The specimen measures 54.70 x 26.10 x 19.30 mm, and is designated n a for cut, reflecting its current rough configuration. Color evaluation registers medium color intensity, a balanced hue with warm yellow tones that are neither overly light nor deeply saturated, making the stone versatile for a range of cutting approaches. The rough has been described with excellent polish on exposed surfaces, which indicates a high degree of surface smoothness and luster even prior to full cutting, and crucially this stone has no enhancement, a factor that significantly elevates its market standing and long term value, especially for discerning collectors and connoisseurs who prioritize natural, untreated material.

Weight is the defining characteristic of this piece, and at 115.63 carats it shifts this sapphire into a rarity class that few gems attain. Gemstone value does not scale linearly with carat weight, per carat prices typically accelerate as size increases, due to the geometric scarcity of large, clean, well colored crystals. For yellow sapphires, a natural, unheated stone of this mass commands a disproportionate premium, because the supply of similar sized, untreated sapphires with uniform color and translucency from a reputable origin like Ceylon is extraordinarily limited. The sheer dimensions of this rough give cutters the flexibility to plan for large single stones, matched pairs for high end jewelry, or exceptional freeform designs, each of which can command distinct market premiums that reflect the piece specific rarity and design impact.

From a technical cutting perspective, the 54.70 x 26.10 x 19.30 mm profile suggests several specialized strategies to optimize color saturation, weight retention, and optical performance. Orientation is paramount, because pleochroic response and any internal zoning will dictate the best axis for pavilion and crown alignment, ensuring maximum color face up. If the cutter prioritizes a faceted brilliant or mixed cut, typical yield expectations for corundum range widely depending on inclusion distribution, but careful planning can preserve substantial carat weight while achieving optimal brilliance. For example, selecting a shallow pavilion and broad table with a mixed cut crown can retain a larger finished weight, while a deeper pavilion with optimized crown angles can improve scintillation at some cost in carat loss. For clients who value the largest single stone weight, cabochon or gently domed freeform options can preserve a higher percentage of the original mass, and for collectors seeking maximum clarity and brilliance, precision faceting using modern CAD assisted mapping and computerized preforming will allow us to remove inclusions efficiently, preserve key color zones, and produce crisp facet junctions consistent with the excellent polish already present on the rough.

Craftsmanship considerations include preforming under strict orientation control, selective removal of rutile needles or silk with minimal weight loss, and final polishing techniques that exploit the sapphire s hardness to produce highly durable facet planes and exceptional luster. The excellent polish already observed indicates the material will take a final lap finish exceptionally well, yielding sharp facet edges and strong light return. Given the Ceylon origin, cutters will also consider traditional faceting styles that complement the characteristic honey to golden yellow hues associated with the region, for instance a large oval with gently curved pavilion facets for a warm glow, or a step cut for a museum quality table and even color distribution. The absence of enhancement means the stone retains its full natural refractive properties, and will present true optical behavior post cutting, an attribute that clients consistently prize and that materially impacts appraisal outcomes.

At The Natural Sapphire Company we can offer bespoke planning for this 115.63 carat rough, including high resolution imaging, facet planning, and cost to yield projections tailored to the chosen finishing strategy. We will evaluate tradeoffs between maximum finished carat weight and optimal cut quality, present realistic yield scenarios, and recommend faceting plans that maximize market positioning, whether that is a single large statement gem, a matched pair for high jewelry, or a collection of smaller calibrated stones with retained historical provenance. Given the rarity of an untreated Ceylon yellow sapphire at this scale, provenance and enhancement status materially increase both collector interest and institutional valuation, and our team will document the stone s origin and treatment history to accompany any finished gem. This specimen represents a rare investment grade opportunity for advanced buyers who understand how carat weight, origin, natural state, and skilled craftsmanship converge to create exceptional value.