Description: This natural black diamond displays a remarkably compact and rounded morphology, giving the specimen a highly distinctive sculptural presence uncommon among rough diamonds. Rather than exhibiting elongated crystalline geometry or aggressive angular development, the stone presents a cohesive and balanced three dimensional structure with strong visual density and immediate character. Its appearance is dominated by an intense deep black body colour combined with a dark metallic adamantine lustre that reacts sharply under direct illumination. Unlike transparent diamonds that depend on internal brilliance, this specimen expresses itself through surface interaction, contrast and reflective behaviour. Light is absorbed across the darker zones and then selectively released through concentrated metallic flashes distributed along the natural crystalline surfaces. The rounded silhouette and dark reflective behaviour immediately evoke the visual identity of a natural black pearl, which explains perfectly the appropriateness of the designation “Black Pearl Diamond”. Despite being a genuine natural diamond, the specimen carries the same compact elegance and quiet visual authority associated with fine black pearls, though expressed here through adamantine mineral reflections rather than organic lustre. The exterior preserves a highly textured network of natural growth features and irregular crystalline planes formed entirely through geological processes. These surfaces remain completely untouched and unpolished, allowing the diamond to retain its authentic mineralogical identity and natural structural complexity. Under stronger lighting conditions, the stone develops sharp silver grey reflections that emerge dynamically against the dark body tone, creating a sophisticated contrast between opacity and brilliance. These reflections appear focused and directional rather than dispersed, reinforcing the compact visual strength of the crystal. The morphology itself contributes significantly to the specimen’s appeal. The rounded and balanced geometry gives the diamond an unusually harmonious appearance, while the irregular natural surfaces introduce texture, depth and visual movement across the entire specimen. Depending on orientation, certain zones reveal subtle variations in reflectivity and internal density, enhancing the perception of dimensionality. Recovered from the diamond rich alluvial deposits of Lunda Norte, Angola, this specimen remains entirely natural and untreated, preserving both its geological authenticity and its uncommon visual identity. This is a black diamond defined not by transparency or conventional brilliance, but by structure, density and controlled reflective behaviour. A compact and highly aesthetic natural crystal with strong collector appeal. Specifications: • Weight: 0.13 g • Weight in carats: 0.65 ct • Dimensions: 4.5 × 4.5 × 4.5 mm • Origin: Lunda Norte, Angola • Gem material: Natural diamond • Crystal form: Natural rough diamond • Morphology: Rounded compact crystal • Colour: Deep black • Colour distribution: Uniform • Transparency: Opaque • Lustre: Adamantine with metallic reflections • Surface features: Natural crystalline growth textures and irregular reflective planes • Internal structure: Dense compact crystalline formation • Condition: Natural, unpolished, untreated Notable Points: • Intense and uniform deep black coloration • Compact rounded morphology with strong sculptural appearance • Strong visual resemblance to a natural black pearl • “Black Pearl Diamond” visual identity reinforced by morphology and lustre • Dark metallic adamantine lustre under direct illumination • Sharp silver grey reflective flashes across natural surfaces • Fully preserved untreated crystal structure • Complex natural growth textures visible throughout the specimen • Strong contrast between opacity and concentrated reflections • Directional light interaction creating visual depth and movement • Natural crystalline planes formed entirely through geological processes • Balanced morphology maintaining visual cohesion from all angles • Distinctive collector oriented appearance uncommon among rough diamonds • Angolan alluvial origin from the renowned Lunda Norte region • Excellent photogenic behaviour under controlled lighting Collector’s Interest: Natural black diamonds occupy a highly distinctive niche within mineral and gemstone collecting due to their visual density, unusual reflective behaviour and powerful structural presence. Unlike transparent diamonds valued primarily for internal fire, black diamonds are appreciated through morphology, texture and surface interaction. This specimen is particularly attractive because of its compact rounded geometry and the sophisticated metallic reflections that emerge across its natural crystalline surfaces. The resemblance to a black pearl further reinforces its individuality, giving the piece an immediately recognisable visual identity rarely encountered in natural rough diamonds. Collectors especially value untreated rough diamonds that preserve authentic natural surfaces and original morphology, as these features maintain the full geological integrity of the specimen while offering a far more individual character than cut material. Lapidary Potential: Although the stone could theoretically be used in small scale jewellery applications, any cutting or polishing would remove the natural textures, reflective behaviour and structural balance that define the specimen’s identity. Its highest value resides in preservation as a natural rough crystal, where its compact morphology, metallic lustre and geological authenticity can be fully appreciated without alteration. ——————- 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