DESCRIPTION: Like a fragment of a tranquil tropical lagoon suspended in crystalline form, this natural rough diamond displays a Deep Blue appearance of remarkable purity and intensity. The Deep Blue is clean, luminous and saturated, recalling the crystal clear waters of an untouched lagoon where light penetrates exceptional depth, revealing an almost electric Deep Blue tone with no visually dominant green component. It is a colour that feels both geological and aquatic, evoking the serene depth of pristine lagoons illuminated by natural light. When illuminated from behind with direct light, the stone undergoes a striking transformation. The Deep Blue intensifies dramatically, becoming brighter and more concentrated, as if the crystal were lit from within. This backlighting effect reveals a vivid internal glow, amplifying transparency and depth while preserving the clarity of the hue. The result is a luminous Deep Blue radiance that recalls the brilliance of sunlit tropical lagoons, where colour becomes increasingly vivid as light penetrates the water. According to the provenance information transmitted by the previous collector, the diamond originates from Lunda Norte, Angola, one of the most important diamond producing regions in Africa. The specimen is presented in its original rough form, preserving the natural morphology and surface character associated with an uncut diamond crystal. The crystal presents a compact rough morphology with irregular planes and softly rounded contours formed through natural geological processes. Natural growth textures and crystalline relief scatter light across the raw surfaces, producing subtle flashes rather than polished brilliance. Even without cutting or polishing, the adamantine lustre is clearly visible, reinforcing the noble character of diamond in its most natural crystalline state. The Deep Blue appearance is particularly expressive under controlled illumination, where changes in light direction significantly influence both saturation and internal brightness. As the specimen has not been laboratory tested, the origin, nature and stability of this colour have not been scientifically determined. This piece stands as a quiet but powerful expression of colour and natural crystal character. Presented uncut and unpolished, it communicates visual interest through its Deep Blue appearance, behaviour under light and preserved rough morphology, shaped not by design but by pressure, time and the natural language of the Earth itself. SPECIFICATIONS: • Weight: 0.11 g • Weight in carats: 0.55 ct • Dimensions: 4.5 × 4.5 × 4.5 mm • Origin: Lunda Norte, Angola, according to the provenance information transmitted by the previous collector • Gem material: Natural diamond • Crystal form: Natural rough crystal with compact, irregular morphology • Colour appearance: Deep Blue • Colour distribution: Even and well concentrated • Transparency: Translucent • Lustre: Adamantine • Surface features: Natural growth textures and raw crystalline relief • Condition: Natural, unpolished • Treatment: Natural, but not laboratory tested • Documentation: This diamond is not accompanied by any type of document NOTABLE POINTS: • Intense Deep Blue appearance with strong saturation The crystal displays a highly expressive Deep Blue appearance with excellent visual intensity. • Colour evocative of pristine tropical lagoons Its luminous blue character recalls the crystalline depth of clear tropical waters. • Strong chromatic response under direct backlighting The blue appearance intensifies considerably when illuminated from behind. • Deep Blue intensification under transmitted light Backlighting produces a brighter and more concentrated internal blue expression. • Clean and concentrated visual hue The colour appears remarkably cohesive throughout the compact crystal. • Provenance attributed to Lunda Norte Lunda Norte, Angola, according to the provenance information transmitted by the previous collector. • Untouched rough crystal morphology The specimen preserves its original uncut and unpolished form. • Authentic natural surface textures Natural crystalline relief remains visible throughout the specimen. • Adamantine lustre visible in the rough state Bright reflective flashes reveal the characteristic lustre associated with diamond. • Distinctive Deep Blue visual character The unusual blue appearance gives the specimen an immediately recognisable identity. • Natural rough state Presented without cutting or polishing. • Strong three dimensional presence Its compact morphology gives the specimen a balanced and visually cohesive form. • Excellent display specimen Highly responsive to controlled illumination and macro photography. COLLECTOR’S INTEREST: Rough diamonds displaying an unusual Deep Blue appearance possess particularly strong visual interest, especially when the colour remains clean, concentrated and highly responsive to changes in illumination. In this specimen, the saturated blue expression combines with a compact natural morphology and visible adamantine lustre to create an immediately engaging rough diamond. Its colour becomes particularly vivid under transmitted light, revealing a brighter and more luminous Deep Blue expression while preserving the natural character of the crystal. The specimen is not accompanied by laboratory documentation, and the origin, nature and stability of the colour have therefore not been scientifically determined. For collectors, its appeal lies in the combination of distinctive colour appearance, natural rough structure, light response and provenance attributed to Lunda Norte, Angola. LAPIDARY POTENTIAL: This natural rough diamond may offer potential for jewellery design, polishing, faceting or preservation in its original form. However, as the origin, distribution and stability of the colour have not been laboratory determined, colour retention during cutting, polishing or any other lapidary procedure cannot be guaranteed. Any lapidary work should be assessed and carried out by a qualified professional, taking into consideration the internal structure, inclusions and colour distribution of the specimen. ——————— Shipping and Handling: All orders are shipped by Portuguese National Post and UPS. • Dispatch time: within 1 to 3 business days after payment confirmation to Catawiki • Transit time service: between 2 to 5 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