0.91 Ct. Blue Spinel from Ceylon (Sri Lanka)

This oval blue spinel presented by The Natural Gemstone Company is a finely proportioned natural gem, weighing 0.91 carat, with dimensions of 6.67 x 5.54 x 3.50 mm, cut in a mixed brilliant style to balance scintillation and depth. The gem is transparent, with a clarity graded as very slightly included at eye level, and it has an excellent polish and no enhancement. Originating from Ceylon Sri Lanka, this spinel carries the geological pedigree that connoisseurs value, as Sri Lankan spinels are historically known for their clean crystal formation and well saturated hues. Chemically a magnesium aluminum oxide, spinel is a durable species suitable for everyday wear, with a hardness that provides confidence when setting in rings and other jewelry, and its natural, untreated state increases its market desirability for collectors and educated buyers who prioritize provenance and integrity over heat treated or otherwise modified stones.

The exact dimensions of this oval create a strong visual presence that is ideal for a statement piece, the length to width relationship produces an elegant outline that flatters on the finger and the girdle to pavilion proportions provide excellent light return, the measured depth of 3.50 mm relative to the average diameter of 6.105 mm yields a depth near fifty seven percent which is within optimal ranges for brilliance and face up color. The mixed brilliant cut enhances both flash and table reflection, giving the dark blue color intensity dynamic life in motion, while the very slightly included clarity evaluated at eye level means that inclusions are minimal and do not materially detract from face up appearance or structural integrity. Because the stone is untreated, the color comes from its natural trace elements and crystal lattice, and the dark intensity of this particular piece makes it especially suited to designs that call for a single dominant center stone, such as a solitaire ring, a bold pendant, or a low profile bezel that showcases the depth of tone without obscuring brilliance.

From an investment and design perspective, this Ceylon blue spinel is compelling, the natural origin and absence of enhancement align with the preferences of collectors seeking verifiable provenance, Sri Lanka remains a respected source for spinel with a consistent track record of producing gems with saturated yet natural color, and the combination of weight, cut, clarity, and polish here creates a stone that reads larger than its carat alone might suggest when set, the oval shape and concentrated color act to maximize visual impact on the hand. Practical recommendations include pairing this stone with a warm or neutral metal to enhance contrast against skin tones, or surrounding it with a delicate halo of contrasting diamonds to amplify perceived size while allowing the natural blue to remain the focal point. For buyers interested in certification, additional photographic documentation, or bespoke mounting options, The Natural Gemstone Company can provide lab reports on request and work with you to design a setting that preserves the stone s integrity and maximizes light performance, please contact us for more detailed measurements, availability, and mounting recommendations, and allow our team to assist you in making this rare untreated Ceylon spinel the centerpiece of your next high quality jewelry commission.