Certified parcel of natural corundum sapphires housed in a sealed Gem Report Antwerp container and accompanied by a full gemological certificate dated 24 November 2025 under report number 18050157AN. This selection contains nineteen transparent mixed-cut stones documented with individual measurements ranging from 2.77 to 5.00 x 2.77 to 4.00 mm and a combined total weight of 4.15 ct. Shapes include round, oval, and pear, providing a versatile assortment suited for calibrated jewelry designs, multi-stone arrangements, and collector-grade sapphire assortments. The parcel displays a vibrant spectrum from light yellow to deep yellow, golden orange, and vivid orange-red tones, reflecting the warm end of the natural corundum color range that is highly sought after in contemporary jewelry design. The laboratory report records the presence of heating, along with suspicion of beryllium diffusion. These enhancement methods are widely used within the gemstone trade to intensify chromatic saturation and optimize optical performance. Transparency is noted as transparent, giving these stones strong internal reflections suitable for precision-setting work. The color variety across the lot allows for harmonious gradient layouts, complementary color combinations, and designs that emphasize the richness of yellow-orange corundum, including cluster pendants, multi-gem rings, and matched earring sets. Gem Report Antwerp’s certification confirms natural sapphire origin and offers traceable grading details essential for gem traders, designers, and collectors. Each stone contributes to a cohesive yet diverse palette that appeals to artisans sourcing warm-toned sapphires for fine jewelry or to collectors expanding curated assortments of certified colored stones. The lot’s mixture of cuts and calibrated proportions supports both commercial-quality production pieces and bespoke handcrafted settings, making the parcel suitable for workshops, gemstone dealers, and enthusiasts looking for documented natural corundum with consistent quality parameters. This certified selection of natural yellow to orange sapphires presents an attractive opportunity for buyers seeking high-transparency gemstones with verified origin, broad color range, and reliable gemological documentation.