1.06 Ct. Blue Spinel from Tanzania

This specimen is a transparent 1.06 carat blue spinel cut in an asscher octagon outline, with exact dimensions of 5.53 by 5.47 by 4.07 millimeters. The asscher faceting style produces a square step pattern with truncated corners, creating an octagonal table plane and a characteristic hall of mirrors effect, and the faceting scheme in this stone emphasizes broad, parallel step facets on the crown and pavilion which generate large flashes of color rather than a multitude of pinpoint scintillation. With a measured pavilion depth that corresponds to approximately seventy four percent of the girdle to girdle average, the cutter balanced depth against table size to concentrate the intense color intensity without creating undue windowing. The stone is graded as very slightly included when evaluated at eye level, with inclusions sufficiently minor that they do not interfere with the gem s transparency or faceting geometry, and the polish has been executed to an excellent standard, producing crisp facet junctions and smooth facet planes that maximize internal reflection. This spinel is wholly untreated, with no enhancement applied, and its provenance is Tanzania, a source noted for producing saturated, stable blue spinels.

From a craftsmanship and optical performance perspective the asscher cut on this piece demonstrates disciplined execution. The step facets are parallel and consistent, yielding a strong contrast between bright facet faces and darker facet windows that define the asscher character, and the truncated corners create secure practical mounting points while preserving the octagon silhouette. The table to crown ratio is conservative, favoring a medium to slightly large table that allows the internal step pattern to present as a coherent geometric motif when viewed face up. The girdle appears even, allowing for precise bezel or prong seatings, and the pavilion facets meet at a well centered pavilion apex, which supports strong return of blue saturation through the crown. Because the stone is intense in color yet transparent, the cutter left modest crown height to prevent over darkening while maintaining depth to enhance the stone s perceived size. For best brilliance in a finished jewel, an open gallery or low bezel that permits light to enter the pavilion is recommended, or alternatively a four prong corner setting to protect the truncated corners and to present the asscher table unobstructed.

When specifying complementary gemstones for a custom setting, consider stones and proportions that reinforce the asscher s geometry and its intense blue. A halo of small round brilliant diamonds in a tight pavé or microsetting will add contrast by providing high dispersion and bright white flashes against the blue, and calibrating the diamond melee to two to three millimeter sizes will visually expand the asscher without overwhelming its 5.5 millimeter footprint. Tapered baguette diamonds or trapezoid side stones set in a three stone arrangement along the long axes will echo the step facets and amplify the architectural aspect of the design. For colored accents, pale cornflower sapphires in a lighter saturation will create a graduated blue palette, while a pair of chrome tourmalines or tsavorite garnets in small calibrated sizes will introduce a vivid complementary green that enhances the blue by contrast. Metal selection should be considered for optical effect, with platinum or eighteen karat white gold maintaining a cool neutral field for the blue spinel, and eighteen karat rose gold offering a warm counterpoint that will shift the perceived hue slightly toward violet blue. For pendant or cocktail ring applications, a channel set row of baguette diamonds arranged to mirror the asscher step planes will create a coherent visual extension of the cut. At The Natural Gemstone Company we can provide precise matching of sizes and color grades for side stones, and we recommend briefings on target diamond clarity and color to avoid visual conflict. Please contact The Natural Gemstone Company to discuss custom design options, exact side stone calibrations, and setting profiles to showcase this Tanzanian asscher blue spinel to its fullest potential.