12.75 Ct. Amethyst from Ceylon (Sri Lanka)

This 12.75 carat cushion shape purple amethyst commenced its journey in the gemiferous terrains of Ceylon Sri Lanka where pegmatitic veins and hydrothermal fissures yield amethyst of notable depth and clarity. Extracted by selective hand mining from shallow alluvial deposits and weathered rock seams, the rough material was inspected at the pit for zoning and crystal integrity. Geologic provenance was recorded at extraction to preserve traceability and ensure that the specimen meets our supply chain transparency standards. The rough displayed a uniformly saturated purple hue and minimal fracturing, characteristics that guided our decision to reserve the piece for precision cutting. At the initial sorting stage the crystal was photographed and measured, and comparative samples were used to model an optimal yield plan that maximizes color concentration while preserving carat weight. This stage established the foundation for the subsequent cutting strategy that would define the stone as a market ready gem.

The cutting and finishing program prioritized optical performance through a mixed brilliant faceting schema adapted to the cushion outline and the stone dimensions of 17.21 x 13.91 x 7.53 mm. The cutter employed a modified pavilion with a series of triangular and kite facets to enhance internal light return, paired with a faceted crown incorporating smaller star facets to sharpen brilliance and scintillation. The mixed brilliant approach balances the cushion silhouette with a lively play of light, controlling windowing and color leakage. Final cut proportions were optimized to present intense color intensity across the table while maintaining depth to prevent unwanted dark zones. Clarity was assessed at eye level and graded as eye clean, indicating that inclusions do not impact visual performance under standard viewing conditions. Polish was executed to an excellent standard using progressively finer diamond laps and cerium oxide finishing, yielding crisp facet junctions and mirror like facet surfaces that intensify the gemstone s apparent saturation. No enhancement was applied to alter color or clarity, preserving natural state and stability for long term wear. Origin certification and full measurements accompany the stone in our inventory at The Natural Gemstone Company.

From final inspection the gem entered our quality control and mounting advisory phase before reaching the market. Each facet plan and facet execution influences setting recommendations, and for this cushion amethyst we advise an open four or six prong setting in warm metal tones to complement the intense purple. For designs pairing this amethyst with complementary stones we recommend juxtaposing it with White Opal to accentuate contrast between the amethyst s saturated body color and the opal s milky play of light. The gem s dimensions and girdle thickness accommodate both prong and bezel constructions, and its 7.53 mm depth gives favorable pavilion angles for secure bezel seats. Before release the stone undergoes final spectral and magnification checks and is photographed to document color under controlled lighting for accurate online representation. The Natural Gemstone Company issues a detailed product dossier including carat weight, exact dimensions, cut description as mixed brilliant, clarity evaluation as eye clean at eye level, color intensity described as intense, polish grade as excellent, enhancement status as none, and origin as Ceylon Sri Lanka. This dossier supports design customization and ensures that jewelers and connoisseurs receive a technical record that informs setting choices and end use.

For the discerning buyer this cushion amethyst presents a combination of technical excellence and natural provenance. The stone s mixed brilliant faceting transforms the raw geological expression into a calibrated optical instrument where facet geometry, polish quality, and proportion converge to produce consistent light return and rich chroma. The absence of treatments means color stability and predictable performance during fabrication and wear. Whether mounted as a central stone in a bespoke ring or incorporated into a multi stone composition with White Opal accents the gem carries both the signature of Sri Lankan geology and the meticulous craftsmanship applied by our lapidary team. The Natural Gemstone Company stands behind the piece with full documentation and advisory support for setting and care, enabling confident acquisition by jewelers and collectors who value precise technical specifications and transparent sourcing.