1.75 Ct. Blue Sapphire Crystal from Ceylon (Sri Lanka)

Presented by The Natural Sapphire Company, this transparent blue sapphire weighs 1.75 carats, with precise dimensions of 14.10 x 4.50 x 3.62 millimeters. The cutting style is identified as Crystal, executed as a polished crystal cut in a long, various shape that reads as a double terminated baton when viewed along its major axis. The stone exhibits an intense color intensity, a clarity grade of slightly included evaluated at eye level, and an excellent polish. The sapphire is heat treated to stabilize and enhance chromophore distribution, and gemological provenance is Ceylon Sri Lanka, which informs the overall hue and saturation that is characteristic of that origin. These baseline attributes set the stage for a gemstone whose primary appeal is technical refinement of form and optical performance.

The geometric faceting on this cut is deliberate and engineered to prioritize maximum light play along the length of the stone. The polished crystal cut employs a series of parallel facet planes aligned longitudinally with precise junctions and symmetry, creating ribbon like flashes as light travels through the body. Facet angles have been optimized for corundum, with a refractive index approximately 1.76 to 1.77, allowing a high proportion of incident light to undergo internal reflection and emerge as concentrated flashes of blue. The elongated table and acute terminal facets create directional light return, producing both broad areas of color and discrete scintillation nodes when the stone is moved. The relatively shallow profile, reflected in the 3.62 millimeter thickness compared with the 14.10 millimeter length, emphasizes lateral light transmission and yields a sustained color ribbon rather than a single focal sparkle.

Clarity and enhancement are addressed with technical transparency, the grade slightly included evaluated at eye level indicating the presence of minor inclusions that do not materially impede the sapphire s overall light performance. These internal features are consistent with natural corundum from Sri Lanka and can contribute to the stone s internal texture without creating dark dead spots. The heat treatment has been applied to improve color saturation and to subtly modify the visibility of certain inclusions, thereby enhancing perceived clarity while preserving natural crystal structure. From a gemological perspective, the combination of slight inclusion, intense color intensity, and excellent polish results in a stone that balances natural character with high optical efficiency, offering both visual depth and resilience under normal wear.

Craftsmanship is evident in the execution of facet symmetry, clean facet junctions, and the finished polish that together enable the crystal cut to realize its design intent. The precision of the facet intersections supports crisp light return and well defined facet reflections, while the elongated geometry invites consideration of mounting strategies that accentuate directional light play. Settings with open pavilion access or low bezel rails oriented east west will allow maximum light entry and display the stone s longitudinal flashes, while secure prong work that preserves the terminal facet integrity will highlight the double terminated form. For collectors and designers seeking a technical statement in blue sapphire, this piece from The Natural Sapphire Company combines measured proportions, optimized facet architecture, thermal enhancement within accepted trade practice, and provenance from Ceylon Sri Lanka, yielding a gem that is both an optical instrument and a refined object of jewelry craft.