1.47 Ct. Yellow Sapphire from Ceylon (Sri Lanka)

This exquisite transparent yellow sapphire weighs 1.47 carat, it is cut in a classic emerald cut shape, and its measured dimensions are 7.01 x 5.04 x 3.94 mm, indicating a depth that translates to about 65.4 percent relative depth, a proportion that supports strong face up color while preserving the elegant step cut silhouette. The clarity grade is very very slightly included when evaluated at eye level, a designation that confirms the stone is essentially eye clean with only minute internal features visible under magnification that do not detract from the overall visual appeal. The color intensity is medium intense, a balanced saturation that reads distinctly yellow without veering toward overly dark tones, and the polish is graded excellent, producing mirror like facet junctions and an immaculate table plane. The stone has been heat treated, a commonplace and stable enhancement in sapphires that optimizes color uniformity and can reduce the appearance of certain inclusions, and the provenance is Ceylon Sri Lanka, a locale noted for producing sapphires with lively, bright hues and a characteristic clarity that collectors and connoisseurs prize. This gem is offered through The Natural Sapphire Company, where provenance, meticulous grading, and jeweler ready finishing are foundational to our presentation.

The emerald cut of this sapphire employs a step facet architecture, characterized by long, parallel facets on the crown and pavilion that create broad, linear flashes of light rather than the pinfire scintillation associated with brilliant cuts. The large table and restrained crown angle of a well executed emerald cut emphasize the stone s body color and internal clarity, and in this specimen the excellent polish ensures facet planes act as high efficiency reflectors, contributing to strong contrast and crisp facet outlines. From a gemological perspective, corundum has a refractive index range near 1.760 to 1.768, and a modest dispersion value on the order of 0.018, so while fire in the form of spectral flashes is inherently limited compared to higher dispersion gemstones, the sapphire s brilliance remains notable due to high refractive power and the precise facet geometry. The step cut promotes broad, mirrorlike reflections and directional luster, and the very very slightly included clarity achieved at eye level means light transmission is largely unobstructed, yielding even, saturated color face up and pronounced internal reflections when the stone is stationary or when it rotates within its mounting.

Under varying lighting environments this yellow sapphire reveals nuanced and technically interesting behavior, which collectors will appreciate for its predictable and aesthetic responses. In natural daylight with a high color temperature, the medium intense yellow leans toward a clear, lemon to canary tone, with daylight s balanced spectrum allowing the stone s inherent yellow absorption bands to manifest without warming bias, and the step facets create broad flashes of white light that accentuate clarity and table brightness. In direct sunlight the higher luminance amplifies contrast between the step facets resulting in pronounced chequerboard like reflections across the table and crown, and the color will read slightly more saturated as increased light intensity enhances absorption. Under incandescent lighting the warmer spectral output shifts the perceived hue toward richer, honeyed gold, the crown facets respond with softer, warmer flashes, and the overall appearance gains an inviting depth. Modern LED lighting varies by correlated color temperature and color rendering index, therefore with a high CRI neutral LED the stone will approximate daylight performance, and with a warm LED it will approach incandescent warmth. In candlelight or other low and warm point light sources the sapphire s step cut expresses its luster as broad, gentle flashes rather than needle like scintillation, producing an elegant glow and an impression of deeper color due to lower intensity and red weighted light. The sapphire also shows subtle pleochroism inherent to corundum, often presenting slightly different yellow tones when viewed along different crystal orientations, an attribute most apparent when the stone is rotated under directional light.

From a craftsmanship and practical perspective this 1.47 carat emerald cut yellow sapphire is engineered to showcase Ceylon s characteristic clarity and balanced color, the facet cutting displays disciplined symmetry and polished facet junctions, and the heat treatment applied is standard practice intended to stabilize and enhance the stone s body color while maintaining structural integrity. Given the step cut geometry and eye clean clarity, settings that expose the pavilion and allow significant light entry are recommended to maximize the stone s face up brilliance, and metal choices will influence perceived warmth, with yellow gold tending to enhance the yellow saturation and platinum or white gold providing a crisp contrast that emphasizes clarity and coolness. For jewelry that will be worn daily, corundum s Mohs hardness of 9 confers excellent durability, and the stone s excellent polish will retain its reflective performance with routine care. At The Natural Sapphire Company we document origin and treatment and present detailed measurements so that professional buyers and informed collectors can assess optical performance, and this Ceylon emerald cut yellow sapphire represents a refined balance of technical merit and visual presence worthy of mounting in a piece designed to celebrate its step cut elegance and vibrant yellow personality.