1.68 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This 1.68 carat transparent cushion shape blue sapphire from The Natural Sapphire Company presents itself as a rare combination of size, color, and clarity, all finely calibrated for both visual impact and everyday wear. The gem measures 7.42 x 6.14 x 3.81 mm, a proportion that reads large at the table yet stays comfortable for a wide range of settings. It is cut in a mixed brilliant style, combining the sparkling facets of a brilliant cut on the crown with complementary pavilion facets, and its excellent polish ensures each facet speaks with clarity. Evaluated as eye clean at typical viewing distance, this sapphire carries vivid color intensity that reads as a deep pure blue on the hand, and the stone is heat treated in a stable, professional manner that enhances color while preserving natural character. Origin Ceylon Sri Lanka is rarefied language in the world of sapphires, and it helps explain the lively tone and the way this gem plays with light, qualities that The Natural Sapphire Company sources with care.

The reason this sapphire sparkles in a way that many other stones do not begins with its crystalline nature. Sapphires are corundum, an aluminium oxide crystal with a high refractive index around 1.76 to 1.77, and a small but meaningful birefringence near 0.008. Those optical constants mean that light bends and splits inside the stone in predictable ways, enabling precise cuts to maximize light return and scintillation. The mixed brilliant cut on this cushion shape is especially effective because the brilliant facets on the crown break incoming light into many small flashes, while the pavilion facets control the manner in which that light returns through the table. The cushion outline softens the geometry, creating broad flashes of saturated blue that merge with lively pinpoint scintillation as the gem moves. The excellent polish on every facet allows internal reflections to remain crisp, so that blue appears deep and luminous rather than flat, and surface light return reads as bright contrast against the darker body tone. Because corundum is hard and durable, with a Mohs hardness of nine, the cut retains crisp facet junctions over time, preserving the initial sparkle and making the gem an enduring choice for rings and everyday jewelry.

When you compare this Ceylon sapphire to other options on the market, several advantages stand out. Against diamonds, this sapphire offers color that diamonds cannot, and where a diamond achieves fire through dispersion, this sapphire achieves a uniquely rich and saturated blue through body color and facet driven light play, making it the premier choice for those who want vivid color with serious brilliance. Against other sapphires that may come from different localities or that may be heavily included, this stone offers an exceptional combination of eye clean clarity and vivid intensity, which elevates visual presence without sacrificing value. Versus emeralds and other colored gemstones that often carry significant surface reaching inclusions or are routinely oiled, the heat treated corundum of Sri Lankan origin is stable and predictable, and it responds beautifully to precision cutting. The mixed brilliant cushion cut here is superior to many standard cuts because it balances color saturation and light return. Larger pavilion depths or poorly aligned facets in other stones can trap light, causing a stone to appear dull or dark, but the calibrated dimensions of 7.42 x 6.14 x 3.81 mm for this 1.68 carat gem were chosen to avoid that pitfall, producing a bright table view and lively face up appearance that makes the sapphire read larger and more vivid than many stones of similar carat weight.

Choosing this sapphire from The Natural Sapphire Company means selecting a stone that has been evaluated and finished with deliberate care, and that arrives ready to become a focal point of a custom ring or an heirloom piece. The combination of vivid Ceylon blue, eye clean clarity, mixed brilliant cushion cut, and excellent polish creates a gem that sits visually above many market alternatives in terms of presence and wearable sparkle. For setting suggestions, a moderately open gallery and a slightly elevated setting will allow light to enter the pavilion and return through the crown, maximizing the scintillation that makes this stone so compelling. In a halo design or as a solitaire mounted with warm white metal, the deep blue and lively flashes will contrast beautifully, and in more contemporary bezel settings the durable corundum will remain safe while still offering strong color. Because the enhancement is heat treatment, it is a stable and widely accepted method to bring out the best in natural sapphires, and because The Natural Sapphire Company stands behind the provenance and quality of its gems, you are purchasing more than a stone, you are investing in craftsmanship, ethics, and lasting beauty. If you seek a cushion shaped blue sapphire that combines structural optical advantages with exceptional finish and provenance, this 1.68 carat gem is a rare and sensible choice.