1.00 Ct. Yellow Sapphire from Ceylon (Sri Lanka)

This loose gemstone is a transparent yellow sapphire weighing 1.00 carat, presented in a radiant shape with precise dimensions of 7.26 x 4.20 x 3.37 millimeters. The cut is a radiant cut, a hybrid of step and brilliant faceting designed to maximize both brightness and broad flashes of color. Clarity is graded very slightly included when evaluated at eye level, which means the stone remains visually clean to the unaided eye while retaining natural internal characteristics that are typical of sapphire. Color intensity is classified as intense, offering a saturated yellow tone that is vivid without appearing overly dark. The surface finish is described as excellent polish, ensuring crisp facet junctions and smooth planes that enhance light return. The origin of this sapphire is Ceylon, Sri Lanka, a source known for producing stones with lively color and clarity, and the gem has been heat treated to stabilize and intensify its color, a common and widely accepted enhancement for sapphires. Certificate documentation accompanies the stone, and The Natural Sapphire Company provides full certification details to verify these attributes.

Under varying lighting conditions this sapphire presents a spectrum of visual behaviors that reflect its quality and cut. In bright daylight or direct sun the intense yellow color reads as fresh and lemon to golden, with the radiant cut producing broad, bright flashes across the table and crown facets, and crisp scintillation from its trimmed corners. The excellent polish allows strong light transmission, so when viewed against a white background the stone displays uniform saturation with lively facet reflections. Under warm incandescent light or candlelight the yellow shifts toward a richer golden hue, and the stone exhibits softer, glowing areas where internal reflections are warmed by the light source. In cool LED or fluorescent lighting the tone can appear slightly more lemon or clear, and the brilliant facets emphasize crisp white flashes and contrast that highlight the faceting pattern. In lower ambient light the strong polish and precise faceting preserve sparkle, with smaller, rapid scintillation visible as the gem moves, and the intense base color remains perceptible even when overall brightness is reduced. The radiant cut balances broad flashes and lively sparkle, producing a mix of large, bright facet reflections and smaller scintillation that contributes to a dynamic appearance from many viewing angles.

Practical considerations for setting and daily wear follow from the stone dimensions and optical performance, and The Natural Sapphire Company recommends approaches that allow light to enter and reflect freely. A prong setting will maximize brilliance by exposing the pavilion to incoming light, while a low bezel will protect the girdle but will modestly reduce the stone s apparent brightness. Warm metals such as yellow gold will complement the natural yellow hue and produce a harmonious, monochromatic presentation, while white metals will create contrast that makes the color read more vivid against a cooler field. The 1.00 carat weight and the 7.26 by 4.20 millimeter table present well as a center stone in solitaire or halo settings, and when mounted the radiant cut s mixed facet pattern provides consistent performance in both ring and pendant orientations. As corundum, sapphire registers high on the Mohs hardness scale, making this stone suitable for regular wear when set responsibly, and the heat treatment applied is stable for normal use. For routine care, gently clean with warm soapy water and a soft brush, avoid harsh chemical exposure and extreme thermal shock, and when in doubt consult a professional jeweler. The Natural Sapphire Company provides full documentation and imagery for this gem, and the accompanying certification confirms the carat weight, dimensions, clarity grade, color intensity, cut style, treatment, and origin, ensuring transparent provenance and technical detail for designers and clients.