20.02 Ct. Yellowish Green Apatite from Brazil

This transparent yellowish green apatite weighs 20.02 carats, a substantial and uncommon size for this species, and measures 18.80 x 15.91 x 9.52 mm, proportions that yield an approximate depth of 9.52 mm and a depth ratio of approximately 55 percent based on the average of length and width. The stone is fashioned in an oval outline with a mixed brilliant cut, employing a brilliant facet arrangement on the crown and modified pavilion geometry to balance scintillation and color spread. The mixed brilliant faceting optimizes light return for a stone of this scale, creating strong internal flash while maintaining broad color saturation across the table. Clarity has been graded as slightly included, evaluated at eye level, with inclusions that do not significantly interrupt transparency or light performance. Color intensity is classified as intense, a vivid yellowish green that is evenly distributed, and the polish is excellent, producing crisp facet junctions and a high degree of surface luster. No enhancement has been applied, and the material is documented as originating from Brazil, a source known for producing well colored apatite crystals.

The 20.02 carat weight is a primary driver of this specimen's rarity and value, given that transparent, intensely colored apatites at this scale and without enhancement are relatively scarce. Weight in colored gemstones increases value nonlinearly, with larger sizes commanding premium per carat pricing due to their rarity, greater visual presence in jewelry, and the increased difficulty of finding uniformly saturated material in larger rough. In practical terms, this piece at 20.02 carats will present a significant face up size in an oval configuration, offering strong spread for rings or bespoke pendants while retaining proportional depth for optimal brilliance. From a material handling perspective, remember that apatite typically has a Mohs hardness near 5, making protective settings and careful wear advisable to preserve facets and polish. The Natural Gemstone Company provides full disclosure of origin and treatment status, and this unenhanced Brazilian apatite exemplifies the combination of size, color intensity, and cutting precision that informed collectors and designers seek, offering both an immediate visual impact and a durable investment in a rare, large example of gem quality apatite.