1.28 Ct. Greenish Blue Sapphire from Australia

This listing describes a single transparent, greenish blue sapphire, weighing 1.28 carats, presented in an emerald cut shape, with precise dimensions of 7.05 by 5.30 by 3.61 millimeters, clarity graded as very slightly included when evaluated at eye level, color intensity graded as intense, and an excellent polish. The stone has been enhanced through controlled heat treatment, and its origin is Australia. The emerald cut emphasizes the stone's depth of color through step facets and a broad table, reinforcing the gem's clarity and internal light pattern. The 1.28 carat weight, combined with the measured proportions, produces a balanced face up size for a center stone in many traditional and contemporary settings. The very slightly included clarity grade indicates minor internal characteristics that are not visible to the naked eye under typical viewing conditions, and the excellent polish ensures crisp facet junctions, clean reflections, and a refined surface finish. These objective characteristics are noted and recorded by The Natural Sapphire Company to support transparent evaluation and to assist in design and setting decisions.

The sapphire's geological and ethical journey began in Australian alluvial and primary deposits, where the host rock and weathering processes concentrate corundum crystals in accessible seams and gravels. In the earliest phase, trained field teams and local partners conduct careful excavation and screening to recover rough material efficiently and responsibly. Each recovered crystal undergoes initial sorting for color, clarity, and size, then a preliminary documentation of provenance and condition is recorded. The greenish blue hue of this sapphire reflects trace element chemistry within the corundum lattice, with iron and titanium contributing to the blue component and additional local geochemical conditions yielding the greenish undertone, creating the unique color identity that Australian sources are known to produce. Throughout the recovery and preliminary handling stages, practical measures are taken to minimize unnecessary handling, to preserve the integrity of the rough, and to maintain a chain of custody that links the finished gem back to its place of origin, in alignment with The Natural Sapphire Company standards.

Once selected for cutting, the rough sapphire was evaluated by experienced lapidaries to determine the optimal orientation and cutting plan, aiming to balance color saturation, weight retention, and the final shape. The choice of an emerald cut shape was made to highlight the stone's intense color through broad step facets and a generous table, while also managing the visibility of any inclusions. Skilled cutters preformed the rough to remove surface irregularities and to establish the pavilion and crown angles that would maximize face up color and light return. The material was then precision faceted to create parallel steps, crisp edges, and symmetrical proportions, culminating in an excellent polish that enhances surface luster and transparency. Following cutting, the sapphire underwent a controlled heat treatment process at elevated temperatures, a widely accepted enhancement in the industry, applied to stabilize and intensify color and to reduce certain clarity features. This treatment was performed with consistent temperature control and cooling protocols to preserve the crystal structure and to achieve predictable enhancement outcomes. The final result is a transparent, well proportioned gem with an intense greenish blue hue, consistent clarity when viewed at eye level, and a refined surface finish.

In market presentation and certification, The Natural Sapphire Company documents the stone by weight, measurements, cut description, clarity grade, color assessment, enhancement disclosure, and origin attribution, providing a complete and factual record for buyers and designers. The emerald cut profile, with dimensions of 7.05 by 5.30 by 3.61 millimeters and a weight of 1.28 carats, suits a range of applications including solitaire and halo ring designs, classic stud earrings, or a central pendant, where the stone's step facets and tonal depth can be showcased. In hand, the gem displays a sophisticated interplay of blue and green tones as viewing angle and light source change, and the step cut delivers an architectural elegance that complements both modern and vintage settings. For clients seeking technical details, additional documentation and photos can be supplied, including magnified imagery that illustrates the stone's internal features consistent with the very slightly included grade. The Natural Sapphire Company maintains rigorous quality control and provenance verification, and offers measured, factual information to support professional gemological assessment and bespoke design decisions.