**Complimentary Specimens** As a gesture of appreciation, every winning lot above €50 will include one extra mineral, added entirely free of charge. For each additional €50, another complimentary specimen will be added. —————— Description: Like a fragment of sunlight condensed into crystal form, this natural fancy vivid yellow diamond presents itself as a rare cubic expression shaped entirely by geological forces. Its body colour is an intense, saturated yellow, vivid and unapologetic, carrying a chromatic purity that immediately distinguishes it from softer or diluted yellow tones. Even at rest, the colour feels concentrated and alive; under direct illumination, it ignites dramatically, flooding the crystal with a radiant internal glow that amplifies its cubic geometry and makes the form appear almost illuminated from within. This diamond originates from the alluvial deposits of Lunda Norte, Angola, a region internationally respected for its ancient diamond bearing river systems and for producing stones with remarkable chromatic stability. Over immense spans of geological time, diamonds formed deep within the mantle were released, transported, and naturally concentrated by rivers, preserving crystals that often retain exceptional colour integrity. In fancy vivid yellow material, this process is particularly significant, as it allows the saturation to remain bold and stable even in very small, untreated crystals. What sets this specimen apart is its natural cubic crystal form. Cubic diamonds are not shaped by human intervention but grow this way under specific conditions of pressure, temperature, and atomic alignment during formation. The cubic habit reflects a rare balance in growth dynamics, where the crystal develops equally along its axes, resulting in a block like geometry with near right angled faces. This structural symmetry is uncommon in natural diamonds and becomes even more exceptional when paired with a fancy vivid yellow colour of this intensity. The crystal retains its fully natural morphology, with sharp yet organically textured faces, subtle growth relief, and raw surface features that speak directly to its geological origin. Light interacts strongly with the flat cubic faces, producing bold flashes and mirror like highlights that accentuate both colour and structure. Unlike rounded or irregular crystals, the cubic form creates a striking contrast between precise geometry and natural surface texture, reinforcing the sense of rarity and natural intention. There is a powerful contrast between the brutal simplicity of its extraction and the refined nobility of the material itself. Lifted from ancient gravels and preserved exactly as nature formed it, this diamond communicates rarity through form, colour, and geological story rather than size. It is a specimen that embodies the intersection of natural order and chromatic intensity, where crystal structure and colour coexist in rare equilibrium. Specifications: • Weight: 0.03 g • Weight in carats: 0.15 ct • Dimensions: 2 × 2 × 2 mm • Origin: Lunda Norte, Angola • Gem material: Natural diamond • Crystal form: Natural rough cubic crystal • Colour: Fancy vivid yellow • Colour distribution: Concentrated and even • Transparency: Translucent • Lustre: Adamantine • Surface features: Natural growth textures and crystalline relief • Condition: Natural, unpolished Notable Points: • Rare natural cubic crystal form • Intense fancy vivid yellow colour with strong saturation • Colour dramatically intensifies under direct illumination • Flat cubic faces enhance light reflection and colour presence • Natural alluvial origin from historic Lunda Norte deposits • Exceptional chromatic stability despite very small size • Clear geometric structure shaped solely by geological conditions • Untouched surface with authentic growth textures • Adamantine lustre visible on raw crystal faces • Strong contrast between precise geometry and natural texture • Highly distinctive morphology among natural coloured diamonds • Rare combination of cubic habit and vivid yellow colour Collector’s Interest: Natural fancy vivid yellow diamonds already represent one of the most desirable colour categories, but specimens that preserve a true cubic crystal form elevate that rarity further. This diamond offers collectors a direct expression of natural geometry, colour intensity, and Angolan provenance, making it especially compelling for advanced collections focused on coloured diamonds, unusual crystal habits, or geological purity preserved without alteration. Lapidary Potential: While remarkable as a natural crystal, this diamond also presents intriguing lapidary considerations. The cubic form provides clear insight into growth orientation, while the vivid yellow colour demonstrates strong stability under light. Any cutting decision would prioritise colour preservation over yield, yet even as a reference specimen, the stone offers exceptional value for studying the relationship between crystal habit, colour concentration, and light behaviour in fancy vivid yellow diamonds. ——————- Shipping and Handling: All orders are shipped by Portuguese National Post. • Dispatch time: within 1 to 3 business days after payment confirmation to Catawiki • Transit time with CTT service: between 5 to 7 business days within europe and worldwide, depending on destination national post. • A tracking number is always provided Photography and transparency: All photographs are taken under controlled lighting conditions using a macro lens, carefully selected to present each specimen as accurately as possible. No filters, colour enhancement, or artificial saturation are applied. The lighting setup uses a calibrated 5500K light source, replicating neutral daylight to reveal natural tones, surface features, and internal characteristics. Under warmer or weaker indoor lighting, colours may appear slightly different, which is normal. The purpose of this photographic process is documentation and representation, not visual enhancement. Images are intended to reflect the specimen faithfully as it appears under balanced natural light conditions. Identification and ethics: All specimens offered are natural and described to the best of our knowledge, based on direct sourcing, professional experience, and information provided by trusted suppliers working at the origin. Every effort is made to ensure transparency and accuracy regarding identification, locality, and general characteristics, avoiding misleading statements about treatment, provenance, or nature. Customs and import taxes: Any customs duties, import fees, or local taxes applied by the destination country are entirely the responsibility of the winning bidder. These charges are not included in the auction price or shipping cost and are determined by the buyer’s local authorities. Guarantee and resolution: Customer satisfaction is important. In the unlikely event of an issue such as loss, damage, or discrepancy, please contact us promptly through Catawiki’s messaging system. Each case is handled individually and fairly, with appropriate solutions offered when justified. Appreciation and commitment: We sincerely thank you for your trust. Our work focuses on careful selection, accurate representation, and respectful presentation of mineral specimens with character and interest. Each piece is chosen for its individual qualities rather than speculative or financial considerations. We aim to provide a transparent, reliable, and consistent experience for collectors at all levels. With gratitude, GemPulse Minerals