4.30 Ct. Green (Lime Green) Peridot from Ceylon (Sri Lanka)

This 4.30 carat oval peridot from Ceylon presented by The Natural Gemstone Company is a study in proportion and optical optimization, specified at 11.08 by 9.16 by 6.21 millimeters. The length-to-width ratio of approximately 1.21 produces a balanced oval outline that reads as classic yet contemporary in finished jewelry. The cutter employed a mixed brilliant faceting scheme to reconcile the gem’s refractive characteristics with the desire for both lively scintillation and saturated face-up color. With a measured depth that yields an effective depth percentage of roughly 61 percent relative to the mean of the length and width, the pavilion and crown angles have been tuned to return light efficiently through the crown while preserving the intense lime green hue characteristic of Sri Lankan peridot.

The faceting architecture is deliberately hybrid. The crown exhibits a brilliant-style arrangement of star, bezel, and upper girdle facets to fragment incident light into small, lively flashes and to create scintillation across the table plane. The pavilion is configured in a modified scheme that reduces internal light leakage under peridot’s refractive index range, which is approximately 1.654 to 1.690. This mixed approach benefits from relatively steep lower girdle facets and slightly conservative pavilion culet geometry to prevent windowing while maintaining an even distribution of color. Table size has been held at a moderate proportion to balance brilliance and color saturation; a larger table would bias the appearance toward brightness but could wash the intense lime tone, whereas too small a table would over-emphasize contrast and reduce apparent size. The excellent polish and disciplined facet junctions enhance the stone’s transparency and allow the peridot’s intrinsic dispersion and luster to be read without interference from surface haze.

Clarity is graded as slightly included at eye level, and those internal features constitute the gemstone’s most distinguishing fingerprint. Peridot typically hosts an assemblage of inclusion types that are diagnostic when viewed with loupe or microscope, and this specimen displays a characteristic mix that contributes to an unmistakable signature. Fine acicular and needle-like crystal inclusions, oriented along growth directions, create subtle linear textures visible under magnification and produce localized light scattering that accentuates facet flashes. Small, isolated crystal inclusions and the occasional reflective platelet or negative crystal can be seen in pavilion regions; these act as micro-reflectors, generating pinpoints of contrast that animate the stone as it is moved. There are also faint surface-reaching feathers near the girdle area that are stable and well-polished, not compromising the structural integrity of the gem. Collectively, these inclusions are not deleterious in the context of the gem’s overall eye-clean appearance, but rather they provide a verifiable internal map that confirms natural origin and creates a unique visual fingerprint for connoisseurs and gemologists alike.

Color and treatment details are explicit and consequential for valuation and setting decisions. The face-up color is intense lime green, and the heat treatment enhancement applied to this material has been executed to stabilize and intensify that vivid saturation while minimizing any residual brownish tones that can occur in untreated stones. Heat treatment in peridot is a recognized enhancement to enhance hue uniformity; in this instance the process has been controlled to avoid over-saturation or color zoning. The result is an intense color intensity grade that reads consistently through the crown facets and across the table, with slight variance when viewed against different backgrounds. Optical behavior related to the orthorhombic crystal system is evident as a modest birefringence of approximately 0.036, producing slight doubling of facet junctions under high magnification, which is an expected and verifiable diagnostic property. The gem’s excellent polish accentuates these optical properties, maximizing brilliance, and ensuring the intense lime green remains the dominant perceptible attribute in finished jewelry. This Ceylon origin peridot, with its documented proportions, mixed brilliant cut, and signature inclusions, represents a technically considered choice for collectors and designers who prioritize measurable attributes and provenance. The Natural Gemstone Company stands behind the stated characteristics and can provide additional grading images and magnified inclusion photomicrographs on request for those requiring closer technical verification prior to setting.