0.90 Ct. Blue Spinel from Ceylon (Sri Lanka)

This offering from The Natural Gemstone Company is a transparent blue spinel weighing 0.90 carat, presented in a cushion shape with precise dimensions of 5.34 by 5.33 by 4.13 millimeters, a mixed brilliant faceting scheme, a clarity grade of included evaluated at eye level, intense color intensity, and an excellent polish. The stone is natural, originating from Ceylon Sri Lanka, and it is untreated, with no enhancement reported. The near equal length and width affirm a true cushion profile that will sit squarely and stably in a variety of custom mountings, while the compact footprint combined with substantial depth yields a strong face up presence for its carat weight. For designers and clients considering a center stone for refined custom work, the combination of a classic cushion outline and a mixed brilliant facet architecture delivers both the soft silhouette prized in vintage inspired pieces and the scintillation demanded in contemporary fine jewelry.

From a cutting and optical performance perspective, the mixed brilliant approach on this cushion spinel is engineered to balance color saturation with lively return of white light. The crown displays smaller star and kite facets to fragment light, while the pavilion integrates modified brilliant pavilion facets to avoid the flat windowing common in shallow cuts. The measured depth of 4.13 millimeters on a 5.34 by 5.33 millimeter table proportion produces a decisive pavilion volume, which concentrates the blue tone and amplifies color saturation when set in open backed or finely pierced settings. The facet junctions and girdle execution achieve excellent polish and careful symmetry, traits that contribute to crisp facet definition and predictable light performance when the stone is rotated within a mounting. For custom jewelers, this gem adapts well to a variety of design solutions, including classic four or six prong solitaires that expose the pavilion for maximum brilliance, low profile bezels that protect the girdle while maintaining the cushion silhouette, and halo treatments where the intense core color will contrast dramatically against bright white accent stones.

Clarity considerations are practical and instructive for artisans and clients planning orientation and setting. The clarity grade of included evaluated at eye level indicates the presence of internal features that are visible without magnification, a characteristic commonly encountered in natural spinels from Sri Lanka and a factor that can be used aesthetically within a design narrative. Inclusions may include small crystals or pinpoint structures, and their location relative to the table should inform the seat and tilt chosen by the setter, enabling concealment beneath prongs or beneath the bezel where appropriate. The excellent polish ensures that facet planes are smooth and free from polish lines that could disrupt light flow, and the robustness of spinel as a jewelry gem supports everyday wear, making it suitable for rings, pendants, and bespoke earrings. The absence of enhancement guarantees that color and clarity are intrinsic, which simplifies disclosure and appraisal, and it preserves long term stability and value for clients seeking natural material integrity.

For commissions, The Natural Gemstone Company can provide high resolution 360 degree imagery and light performance photos to assist in CAD planning and prong placement, along with recommendations on mounting geometry to optimize this stone's optical attributes. Given its size and intense color, the 0.90 carat cushion spinel is ideal as a primary focal stone in delicate to medium scale designs, and it also integrates gracefully as a featured center in three stone or halo compositions that demand a balanced silhouette. When advising fabrication, consider slightly higher crown clearance to reduce the likelihood of windowing and to allow the pavilion to contribute to depth of color, and plan prong placement to either showcase or minimize inclusion visibility depending on the client aesthetic. Contact The Natural Gemstone Company for exacting images, measured facet schematics, and personalized consultation to ensure this Sri Lankan cushion spinel is set to its fullest technical and aesthetic potential.