1.07 Ct. Purplish Blue Sapphire from Tanzania

This cushion shaped purplish blue sapphire, presented by The Natural Sapphire Company, offers a combination of precise proportions and natural character that will appeal to discerning connoisseurs, it weighs 1.07 carats, and measures 6.42 x 5.05 x 3.43 mm, and it is fashioned in a mixed brilliant cut that marries a faceted brilliant crown with a more stepped pavilion arrangement to balance scintillation with color saturation, the depth of 3.43 mm yields a depth percentage of approximately 60 percent relative to the average of its length and width, this proportion is intentionally chosen to maximize face up color while maintaining good light return and strong table presence, the polish is graded excellent, and the overall symmetry is consistent with professional lapidary standards.

The mixed brilliant faceting is executed to emphasize both brilliance and color, the crown has a carefully sized table that allows broad flashes of purplish blue across the table facet, while the brilliant style crown facets break light into scintillant flashes that animate the surface as the stone moves, the pavilion features a series of step oriented facets that act to concentrate and reflect the rich saturation from the body of the stone, the girdle is well defined to facilitate secure bezel or prong settings without impinging on the pavilion optics, the stone presents a pleasing balance between spread and depth that makes its face up appearance larger than many stones of equivalent weight.

Color evaluation shows an intense purplish blue saturation that reads as a deep, velvety blue with a distinct purple component, this hue is typical of fine Tanzanian material and benefits from the no enhancement status of the gem, the lack of heat or other treatments preserves the natural distribution of color zones and any subtle pleochroic behavior, under controlled viewing angles the stone reveals slight shifts between a deeper blue and a cooler purplish blue, these shifts are an optical signature of natural corundum crystallography, the intense color intensity combined with the mixed brilliant cutting strategy produces a strong, saturated face up appearance that will render well in a variety of mounting styles.

Clarity is described as very slightly included evaluated at eye level, this designation indicates that inclusions are minor and do not detract from the gem when viewed without magnification, rather they serve as unique identifiers, internal features such as minute mineral crystals, fine rutile silk, healed feathers and subtle growth zoning provide a map of the sapphires natural formation, under magnification these features can be used to confirm origin and provenance, in the hand the stone remains transparent and lively, the minor inclusions add character and confirm the gemstones natural history without materially affecting durability, the stone is untreated, of Tanzanian origin, and is offered by The Natural Sapphire Company with the expectation that buyers seeking a naturally stable, intensely hued sapphire will appreciate its technical merits and collectible authenticity.