Netopen Raw Diamond Rough Crystal Specimen 1.3ct — Natural Fancy Orange Yellow

The Netopen Natural Fancy Orange-Yellow Raw Diamond Rough Crystal Specimen at 1.3 carats presents a color combination that occupies the boundary between the more common yellow and the significantly rarer orange color categories in the natural diamond spectrum — the orange-yellow that results from a specific combination of nitrogen-related N3 defect centers and additional structural features that modify the pure yellow color into a more complex orange-influenced tone that moves the specimen towards the fancy orange-yellow classification used in the international diamond color grading system. The addition of orange influence to yellow in natural diamonds is not simply a matter of more nitrogen — it requires specific additional structural characteristics that are statistically less common than the pure nitrogen-yellow mechanism, which explains why orange-yellow and orange diamonds command premium pricing over comparable size and clarity yellow diamonds in both the faceted and rough markets. Netopen’s gemological team has assessed this specimen through advanced spectroscopic analysis to characterize the absorption features responsible for the orange-yellow color and to confirm that the color is of natural geological origin, excluding the irradiation and HPHT treatment alternatives that can produce superficially similar color combinations in originally lower-color rough diamonds. The crystal habit is octahedral with good face development and natural surface features. The orange-yellow color appears saturated and consistent throughout the visible crystal body in transmitted light, with no significant color zoning visible at 10x magnification. Dimensions approximately 5.5mm x 5.2mm x 4.9mm. The 1.3 carat weight places this specimen in the size range where natural fancy color rough becomes visually engaging and collectible while remaining accessible relative to the premium investment-grade sizes above 3 carats. Full spectroscopic analysis report, color origin certificate, natural origin confirmation, and conflict-free provenance supplied in Netopen presentation box.