1.18 Ct. Color Change Sapphire from Tanzania

This 1.18 carat color change sapphire from Tanzania presents itself as a textbook example of rare, untreated material suitable for a discerning collection, its measurements of 6.85 by 5.48 by 3.22 millimeters offering a compact yet authoritative presence, its emerald cut shape emphasizing geometric clarity and measured symmetry. The transparency of the stone is noteworthy, allowing the gem to read clean and alive to the eye despite a clarity grade of slightly included when evaluated at eye level. The combination of intense color intensity and excellent polish creates a face up appearance that belies the stone s modest carat weight, making this specimen an ideal selection for collectors who prioritize optical performance and natural provenance over sheer size. As a product offered by The Natural Sapphire Company, this sapphire carries the hallmark of ethical sourcing and expert selection, presented unenhanced, an important criterion for collectors focused on originality and long term value.

The cutting style is a disciplined emerald cut, executed with attention to traditional step facet geometry, parallel pavilion and crown facets, and clipped corners that preserve durability while refining the visual outline. The precise dimensions yield a depth ratio of approximately fifty two point two percent when calculated against the average of the length and width, a proportionality that balances light return with color saturation for step cut stones. Facet junctions are crisp and symmetry is well controlled, which in an emerald cut translates to broad table reflections and long, linear flashes rather than scintillation dominated brilliance, a character that serves to showcase the stone s color and clarity rather than overwhelm them with sparkle. The excellent polish reported on this sapphire enhances the mirror like facet surfaces, permitting an even surface reflection that amplifies the color change effect under varying lighting conditions, while the trimmed corners maintain structural resilience for mounting in settings that favor clean, architectural lines.

This sapphire s color behavior is the principal point of technical fascination, exhibiting a discernible change in face up color between cooler light sources and warmer illumination, a phenomenon prized by specialists and collectors alike. Under daylight balanced or fluorescent lighting the stone presents a cooler bluish violet to violet tone with concentrated saturation, while incandescent lighting draws the spectrum warmer toward a rich purplish hue, an effect that creates two distinct personalities within a single gem. Such color change in corundum is typically associated with trace chromophores like vanadium or chromium interacting with differing spectral distributions of light, and the intense color intensity reported here suggests strong activation of those chromophores. The slightly included clarity grade indicates the presence of internal features that are visible to the unaided eye at normal viewing distance, however these features are sparse and well positioned so as not to interrupt the color plane or to introduce significant windowing, allowing the gem to maintain excellent transparency and even color saturation across its table when face up.

From a curatorial and practical standpoint this emerald cut color change sapphire is an exceptional addition to a high end collection, its untreated state enhancing its desirability for portfolios that value natural rarity and gemological integrity. The gem s balanced proportions and compact footprint make it versatile for presentation in a variety of mounting styles, with open four prong solitaire or a bezel with graduated shoulders both serving to maximize the visible color change while providing secure retention, and a halo setting with small accent stones can increase perceived scale without obscuring the stone s step cut geometry. Collectors should note the provenance of Tanzania as a region that has produced many notable vanadium bearing color change sapphires, a factor that contributes to market interest and traceable origin value. Offered by The Natural Sapphire Company, this sapphire is presented with detailed documentation and professional imagery, and it is an optimal choice for connoisseurs seeking a piece that combines technical excellence in cutting, natural, untreated material, and the dramatic visual appeal of a true color change sapphire.