Species: Natural Corundum Variety: Sapphire Weight: 1.41 carats Measurements: 6.64 × 5.57 × 3.93 mm Color: Blue, displaying a refined medium blue hue with good saturation and even colour distribution Transparency: Transparent Cut: Faceted oval mixed cut; cut grade reported as Good, with balanced proportions and pleasing brilliance Clarity: Eye clean Treatment: No heat treatment / No evidence of treatment Origin: Sri Lanka Laboratory report/number: Gem Report Antwerp (GRA) Report No. 1830015144 Shipping method: Insured shipping advised A certified natural blue sapphire documented under Gem Report Antwerp number 1830015144 AN, dated 24 November 2025, authenticated as a 1.41 carat natural corundum in an oval mixed cut, with full gemmological confirmation of origin, transparency, and the absence of heat treatment. This sapphire exhibits dimensions of 6.64 × 5.57 × 3.93 mm, forming a balanced oval profile that maximizes brilliance while preserving the classic elegance associated with high-quality Sri Lankan blue sapphires. Its transparency is recorded as transparent, supporting excellent internal light movement and contributing to the gemstone’s luminous colour display, which appears as a refined medium blue under direct illumination. The certification notes a suggested origin of Sri Lanka, a region globally recognized for producing some of the most desirable fine sapphires, celebrated for their clarity, saturation, and superior optical performance. The gemmological report explicitly states that no indications of heating are present, placing this sapphire within the highly sought-after subset of unheated natural corundum. Unheated sapphires represent a small fraction of the global sapphire market, prized by collectors, investors, and high-end jewellers for maintaining the stone’s natural crystalline structure and unaltered colour. The absence of heat treatment greatly increases desirability and long-term value potential, especially among connoisseurs who prioritize authenticity and geological purity. The oval mixed cut combines step and brilliant faceting styles, producing a dynamic interplay of light across the stone’s crown and pavilion, emphasizing both brightness and depth of colour while achieving excellent face-up presence. The accompanying images show the sapphire’s rich blue hue, exhibiting a harmonious balance between saturation and tone that reflects the characteristics historically associated with Ceylon sapphires. Its internal reflections reveal a glowing variability of blue shades, transitioning between medium and slightly lighter flashes depending on the viewing angle and intensity of illumination. The oval proportion enhances these optical effects, allowing the gemstone to showcase the brilliance of its mixed cut while maintaining smooth, symmetrical curves. In several images, the sapphire displays a velvety yet luminous texture that indicates a fine distribution of internal inclusions, typical of natural Sri Lankan material and reinforcing the gem’s authenticity. Set within the sealed Gem Report Antwerp card, the sapphire remains protected in its original laboratory-secured condition, ensuring retention of verifiable provenance for future resale, appraisal validation, or custom jewellery production. The security features, including the embedded holographic strip and digitally verifiable certification number, emphasize transparency and traceability, essential for buyers within the fine gemstone market. The clear-case presentation allows full visibility of the stone’s natural colour and cut, creating a professional display suitable for collectors and high-end gemstone enthusiasts. Positioned within SEO-relevant gemstone acquisition categories such as natural unheated blue sapphires, Sri Lankan sapphire investments, certified natural corundum, oval mixed-cut blue sapphires, fine transparent sapphires, and Antwerp-certified gemstones, this 1.41 carat stone represents a compelling example of high-pedigree coloured gemstone craftsmanship. Its geological origin, documented lack of treatment, and balanced oval cut place it squarely within premium search segments valued by collectors seeking long-term appreciation, jewellers designing luxury centrepieces, and buyers pursuing ethically verified, naturally coloured gemstones. This sapphire embodies the essential qualities that define top-tier natural corundum: a captivating blue hue, confirmed lack of heating, Sri Lankan origin, strong transparency, refined faceting, and authoritative certification. United, these attributes create a gemstone of notable distinction, suitable for investment portfolios, heirloom-quality jewellery, or curated gemstone collections centred on authentic, untreated, and beautifully coloured natural sapphires.