1.58 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This 1.58 carat cushion shape blue sapphire from Ceylon Sri Lanka presents a meticulously considered combination of proportions, clarity, and cut that will satisfy discerning collectors, the length measures 7.30 millimeters, the width 5.57 millimeters, and the depth 3.87 millimeters, yielding a depth of approximately 60.1 percent relative to the average diameter, an ideal depth that balances face up presence with internal light return. The gem is fashioned in a mixed brilliant scheme that pairs a faceted crown with a more angular pavilion architecture, the crown facets are arranged to create broad flashes and soft scintillation while the pavilion incorporates a mix of kite and chevron facets to direct light back through the table, the cushion outline retains gently rounded corners and slightly softened shoulders which create a modern classic silhouette. Clarity is graded very slightly included at eye level, the inclusions are minor and well positioned so they do not interrupt transparency or the gem’s overall even tone, the polish is graded excellent, the facet junctions are crisp and free of noticeable polishing lines, evidence of careful lapidary control and attention to symmetry.

Color attributes are calibrated to medium color intensity, the primary hue is pure blue with a subtle violet shift on certain angles that is characteristic of fine Ceylon sapphires, the saturation is full enough to register vivid tone in daylight while remaining transparent and lively, the evenness of color across the table and crown surfaces is excellent with minimal zoning, heat treatment has been applied to enhance uniformity and stabilize the blue hue, this enhancement is common and transparent in outcome, the mixed brilliant cut enhances color performance by concentrating color in the table plane while the pavilion facets break light into slightly cooler and warmer flashes, modest pleochroic behavior may be observed as a gentle change between slightly more violet and slightly more cornflower blue orientations, this optical variability contributes to the gem’s liveliness rather than detracting from its appearance.

Under different lighting environments this sapphire will exhibit distinct yet predictable behavior, in strong midday daylight the medium intensity blue will appear fresher and more vivid, the broad crown facets will display large, even patches of blue with crisp internal reflections, in diffused daylight or cloudy conditions the stone will show a softer, more velvety blue with increased apparent depth as the pavilion returns richer tone, under warm incandescent lighting the stone will take on a slightly warmer blue with enhanced contrast between bright facet windows and deeper facet zones, under cool LED lighting the blue will skew toward a clearer, more electric cornflower appearance with brisk scintillation from the mixed brilliant facet set. Under spot lighting or stage lighting the pavilion architecture will generate dynamic flashes and crisp scintillation as small facet planes catch and return light, movement will produce alternating color flashes due to the stone’s modest pleochroism, the cushion outline plus the approximately 60.1 percent depth create an appealing balance between fire and color. For mounting recommendations The Natural Sapphire Company suggests settings that allow light to enter the pavilion, a well proportioned four or six prong solitaire or a partial bezel with open gallery will preserve brilliance while protecting the corners, pairing the sapphire with a neutral white metal will emphasize crispness and brightness, while a warmer metal can accentuate the slight violet leaning tones. This sapphire is a refined example of Ceylon material, the combination of mixed brilliant faceting, very slightly included clarity at eye level, medium color intensity, excellent polish, and stable heat treatment produce a gem that performs reliably and attractively across lighting conditions, ideal for collectors and bespoke designs that prioritize optical performance and enduring color.