17.87 Ct. Greenish Yellow (Lemon Quartz) Quartz from Brazil

This transparent 17.87 carat cushion shape greenish yellow lemon quartz measures 19.90 by 15.00 by 10.30 mm, and demonstrates a deliberate balance of proportion and optical performance by virtue of its fancy faceting. The cutting style is faceted, executed to emphasize both color saturation and light return, with a relatively broad table that presents the intense lemon hue in even distribution across the crown. The crown and pavilion faceting show a controlled interplay of broad facets and narrow chevrons, producing a starburst effect from the table when viewed face up. The cushion outline was maintained with tight symmetry, and the excellent polish enhances facet junctions and surface brilliance, allowing internal light paths to read with clarity. The overall depth and pavilion geometry were preserved to maximize internal reflection and minimize light leakage, resulting in a stone that reads bright and lively in both direct and diffuse lighting. This example from Brazil sits in the higher end of quartz color intensity for its tone, and the cutting decisions made by the lapidary deliver both saturation and scintillation without compromising transparency.

Under magnification the stone remains eye clean, with no inclusions visible at normal viewing distance, yet it bears a set of diagnostic microscopic features that provide an unmistakable signature when examined with a loupe or microscope. Growth zoning is present as fine, parallel colorless to pale yellow bands that follow the crystallographic axes, and these zones refract light slightly differently, contributing to the dynamic internal flash seen in the images. Minute growth tubes and tiny negative crystal cavities are selectively distributed along those zoning planes, creating localized lensing that intensifies facet reflections rather than detracting from clarity. You will also observe very fine healed chevron like fissures that are completely internal and are sealed, their surfaces polished by the crystal growth process, which softens their optical impact. None of these characteristics are intrusive to eye level inspection, yet together they form a fingerprint that confirms natural origin and natural formation conditions, consistent with material sourced from Brazil and showing no indications of treatment.

From a gemological perspective this specimen combines technical merit with natural diagnostic features, and it is presented by The Natural Gemstone Company with full disclosure of attributes. The stone is untreated, with no enhancement, and its material properties align with quartz class behavior including robust hardness that permits confident setting choices, and low dispersion that yields crisp facet contrast rather than excessive fire. The combination of an intense greenish yellow body color, the precision fancy cushion faceting that generates controlled starburst light return, and the subtle microscopic inclusions that produce a patterned internal scintillation, make this gem desirable to the discerning collector or a designer seeking a statement center stone. For clients who require examination beyond loupe level we can supply magnified imagery and detailed notes on the observed internal features, facet architecture, and proportion relationships, ensuring confidence in both aesthetics and provenance.