1.49 Ct. Heliodor from Pakistan

This 1.49 carat oval yellow heliodor, measuring 9.15 by 7.01 by 3.98 millimeters, exemplifies how molecular structure and precise cutting combine to create exceptional sparkle. Heliodor is a beryl, with refractive indices typically in the range of approximately n? 1.577 to 1.583 and ne 1.572 to 1.578, and a modest birefringence near 0.005 to 0.009. The mixed brilliant cut on this stone is specifically calibrated to those optical parameters, employing a brilliant-style pavilion to maximize internal reflection and a graduated, faceted crown that disperses light into crisp scintillation. The oval proportions, with a length to width ratio of roughly 1.31 and a measured depth that yields an effective optical depth of about 49 percent relative to the average diameter, produce a large, lively face up that balances table size and scintillation. Facet junctions executed to excellent polish reduce surface scattering, permitting the inherent refractive contrast of beryl to return light as a combination of broad flashes and pinpoint scintillation, rather than a washed or windowed face.

Clarity evaluated as very very slightly included at eye level and the medium light color intensity together create a clean, vibrant yellow that reads as natural heliodor without over-saturation. The absence of enhancements preserves the native iron-related chromophores and the crystal lattice continuity, so the light interaction remains purely structural rather than artificially amplified. From Pakistan, this example shows the typical even color zoning and stable hue associated with that provenance, while the cutter has used a mixed brilliant schema and careful facet alignment to counteract the low to moderate birefringence of beryl and to prevent extinction or wash. For connoisseurs who value both gemmological integrity and optical performance, The Natural Gemstone Company presents this piece as a technical success, where cut geometry, facet proportions, polish quality, and natural material properties combine to produce a heliodor whose sparkle is measured by efficient light return, lively scintillation, and a clear, natural color that performs exceptionally in both daylight and artificial light.