0.78 Ct. Blue Sapphire from Tanzania

This specimen is a transparent, natural blue sapphire, cushion shape, weighing 0.78 carat, with precise dimensions of 6.65 by 5.06 by 2.70 millimeters. The cutting style is a mixed brilliant cut, combining faceting arrangements to balance scintillation and color saturation, and the finish is described as excellent polish. Clarity has been evaluated at eye level as very slightly included, indicating minimal internal characteristics that do not detract from the overall transparency and face-up appearance. Color intensity is vivid, presenting a strong, saturated blue, and the stone is offered without any enhancement, directly from its place of origin in Tanzania. The Natural Sapphire Company maintains this description as part of the gem’s documented specifications.

The cushion outline and mixed brilliant faceting have been selected to optimize both light performance and apparent size. The rectangular-oval footprint of 6.65 by 5.06 millimeters gives the gem a pleasing spread for its carat weight, and the mixed brilliant treatment places a brilliant-style facet pattern on the crown to enhance sparkle while using pavilion faceting to deepen and stabilize the stone’s blue. The 2.70 millimeter depth works with the faceting scheme to produce lively return and visual depth without excessively increasing weight, and the excellent polish contributes to an unimpeded interaction with light. These combined proportions make the stone suitable for a range of settings where both color and brilliance are priorities.

Clarity and color behavior are central to the gem’s practical and aesthetic qualities. The grade of very slightly included, as assessed at eye level, denotes small internal features that are not readily noticeable in normal viewing conditions; under magnification these characteristics may be visible to a trained grader, but they do not materially reduce transparency or compromise structural integrity. The vivid color intensity describes a saturated blue that remains stable across viewing angles, benefiting from the mixed brilliant cut which concentrates color at the face while maintaining liveliness. The fact that the sapphire has received no enhancement is significant for collectors who prioritize natural condition and long-term value, since the stone’s appearance is wholly the result of its natural formation and the lapidary work applied without thermal or chemical modification.

Ethical sourcing and traceability are emphasized in the stewardship of this gemstone. Originating in Tanzania, the sapphire is handled according to The Natural Sapphire Company’s sourcing protocols, which include documented chain-of-custody practices and engagement with supply partners to encourage responsible mining and trading standards. Where available, provenance documentation accompanies the gem to support transparency for the purchaser, and the company’s sourcing approach focuses on minimizing adverse social and environmental impacts while supporting fair dealing and local communities. The untreated nature of the stone also aligns with a conscious consumer’s preference for gems whose physical characteristics are intrinsic rather than laboratory-altered, supporting decisions informed by both aesthetics and ethical considerations.

For placement in a considered collection, this sapphire is suited to buyers seeking a durable, wearable gemstone with clear provenance and a natural profile. Sapphire’s inherent hardness and toughness make it appropriate for daily wear in rings, pendants, or other pieces intended for frequent use, and the cushion mixed brilliant cut adapts well to classic and contemporary settings. Its vivid blue face-up color and very slightly included clarity give it an approachable combination of visual impact and practical resilience, while the untreated status and documented Tanzanian origin provide the provenance and ethical context that conscientious collectors and designers prioritize. The Natural Sapphire Company can provide additional documentation, viewing options, and guidance on setting and care to ensure the gem is integrated into a collection in a manner consistent with the purchaser’s standards for quality and responsible sourcing.