1.21 Ct. Blue Sapphire from Australia

This 1.21 carat round blue sapphire from The Natural Sapphire Company presents a disciplined combination of material quality and cutting precision, suitable for collectors and connoisseurs who assess gemstones by measurable attributes. The stone measures 6.45 x 6.43 x 3.33 mm, demonstrating nearly perfect circular outline and well controlled pavilion depth, and it displays transparent body clarity that allows strong internal light return. The cutting style is faceted with a mixed brilliant cut, a deliberate choice that marries a brilliant facet arrangement on the crown with a complementary pavilion geometry, in order to maximize scintillation while preserving depth of color. The color reads as a blue with dark intensity, a tone and saturation that gives the sapphire a velvety face up presence without appearing black under typical lighting. The polish is excellent, producing crisp facet planes and clean facet junctions that enhance both contrast and sparkle. Taken together, these technical characteristics define a gem that is immediately appreciable both in instrumented evaluation and in close visual inspection.

Clarity and proportional geometry are central to the performance of this stone, the clarity being graded as very very slightly included when evaluated at eye level, which translates to negligible impact on visual purity and on the transmitted light pattern. The dimensions indicate an average diameter of 6.44 mm and a measured depth of 3.33 mm, which yields a depth percentage of approximately 51.7 percent, a proportion that favors face up spread and color saturation for a deep tone sapphire. The mixed brilliant faceting strategy further mitigates inclusion visibility by breaking up internal reflections and redirecting light through the crown, so that small natural inclusions remain unobtrusive and do not compromise the gemological integrity. Precision in facet alignment and symmetry contributes to controlled light leakage, balanced dispersion, and an even lustre across the table and facets, attributes that sophisticated buyers will recognize as evidence of conscientious lapidary execution.

This sapphire has been heat treated, an industry standard enhancement applied to many natural sapphires to improve color uniformity and to reduce the visual impact of minor silk or rutile networks, the treatment being stable under normal wearing conditions. The origin is Australia, a source known for producing sapphires with rich, saturated blue tones and durable crystal structure, characteristics that influence both market perception and long term desirability. From a gemological perspective, corundum has a refractive index in the range 1.762 to 1.770 and a specific gravity near 4.00, and on the Mohs scale it rates 9, second only to diamond in everyday wear resistance. The combination of material hardness, dimensional stability, and the permanence of heat treatment results in a stone that will maintain its visual and structural properties across decades with routine care. The excellent polish and precise cutting combined with documented origin and treatment from The Natural Sapphire Company increase the stone’s provenance and market confidence.

When considered as a generational heirloom, this sapphire possesses the practical and intangible qualities that sustain and transmit value. Practically, its durable corundum composition allows frequent wear in rings and other jewelry formats with minimal abrasion, and the round mixed brilliant configuration is versatile for secure mountings such as low rubover bezels or well engineered prong settings that protect the girdle while permitting light access to the crown. A depth near 52 percent and a well executed pavilion give the gem a compelling face up size relative to its weight, enabling classic solitaire, three stone, or halo compositions that can be updated across styles while preserving the original centre stone. From a stewardship standpoint, The Natural Sapphire Company provides documentation regarding origin and enhancement, yielding provenance that can accompany legal and sentimental transfer between generations. Recommended maintenance includes regular professional inspection of the setting, gentle cleaning with warm soapy water and a soft brush to preserve polish, and controlled storage away from abrasive materials, measures that will ensure this Australian blue sapphire remains an emblematic and wearable family treasure for decades.