1.33 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This is a transparent 1.33 carat pear shape blue sapphire, precisely measured at 8.06 x 5.13 x 4.20 mm, cut in a faceted mixed brilliant style that balances table size and pavilion depth for optimized light return. The gem carries a clarity grade of slightly included when evaluated at eye level, a condition that is common in natural sapphires and that does not materially detract from the gem's overall face up performance. Color intensity is vivid, presenting a rich and saturated blue that reads strongly across the table, and the surface finish is an excellent polish that sharpens facet junctions and enhances contrast. This sapphire is heat treated, a stable and widely accepted enhancement that refines the stone's color, and it is of Ceylon origin, a source known for producing sapphires with lively, saturated blues and a distinctive luminescence. The Natural Sapphire Company offers this stone as a well proportioned, gemological specimen suitable for central use in a ring or pendant, with dimensions and cut that suit a range of mounting styles.

Optically, the stone presents a dynamic interplay of color and light, driven by the mixed brilliant faceting which combines step like pavilion facets with brilliant cut crown facets to generate strong scintillation and an even color distribution. The vivid hue is consistently saturated across the table, while the slightly included clarity grade is reflected as subtle, internal features that are typically visible only under magnification or certain viewing angles, and these features do not compromise the gem's brilliance. The excellent polish ensures crisp reflections and clear facet planes, so light that enters the crown is efficiently returned through the table, creating a lively face up appearance. Typical of Ceylon sapphires, there may be a modest pleochroic tendency, with the color appearing marginally cooler or slightly more violet when viewed from specific angles, and this optical variation contributes to the stone's depth and visual interest as it is moved.

Under varied lighting conditions the sapphire demonstrates distinctive behavior that emphasizes different aspects of its appearance, natural daylight, particularly diffused north facing light, tends to reveal the truest balance of hue and saturation, producing a vivid, pure blue that shows the stone's intrinsic color intensity without added warmth. Under warm incandescent light the blue acquires a richer, deeper quality, the tone shifting subtly toward a velvety, midnight blue, and the overall contrast can appear softer while the gem maintains strong internal flash. In cool white LED or fluorescent lighting the stone exhibits crisp, electric blue flashes, with enhanced contrast between bright facet reflections and deeper color areas, and the mixed brilliant cut maximizes scintillation in these conditions. In low light or candlelight the sapphire reads as an inky, saturated blue, with isolated flashes of vivid blue visible with movement, and this range of behavior makes the stone versatile for both daytime and evening wear, delivering presence without losing clarity or depth.

For practical considerations, the pear shape and the stone dimensions make it especially well suited to solitary settings or designs that allow light to reach the pavilion, which will maximize brightness and color saturation, and an open gallery or a mounting that exposes the pavilion will allow the stone to display its full optical range. The heat treatment applied to this Ceylon sapphire is a standard, stable enhancement that improves color while preserving durability, and routine care with mild detergent and warm water, combined with a soft brush, will maintain the polish and luster, professional ultrasonic cleaning is generally acceptable but should be confirmed with a qualified jeweler given the presence of inclusions. The Natural Sapphire Company provides full details on origin and treatment with this offering, and the combination of vivid color, excellent polish, mixed brilliant faceting, and a balanced pear shape makes this 1.33 carat sapphire an appealing choice for collectors and for use as a finely proportioned center stone.