Description: Red held in shadow. Scarlet awakened by light. This natural rough diamond presents a vivid blood red appearance, where bright reflections rise across a richly textured surface and deeper crimson passages give the colour a sense of weight and depth. Like embers beneath a crystalline skin, its red tones reveal different degrees of brightness as the light moves across the stone. Colour provides the immediate attraction. Luminous scarlet highlights alternate with darker red areas, creating a palette that feels concentrated yet varied. The contrast between these passages gives the specimen a strong visual rhythm, with points of brightness drawing the eye into the more shaded contours. Its rounded to irregular natural form gives this colour an organic frame. Uneven outlines, changes in surface direction and softly rounded areas create a sculptural presence that can be appreciated from several perspectives. Each orientation brings a different relationship between illuminated surfaces and deeper recesses. Across the exterior, fine granular textures meet small angular planes and broader reflective areas. This intricate relief breaks the light into numerous individual reflections, producing a lively sparkle across the red surface. Close examination reveals an engaging succession of ridges, depressions and intersecting details. The adamantine lustre adds crisp points of brilliance to the composition. Silvery highlights stand against the saturated red appearance, outlining individual surface features and giving definition to the rough texture. Their brightness provides a striking counterpoint to the deeper crimson tones. Areas of translucency introduce lighter red passages, while more opaque sections retain a denser appearance. These differences contribute to the impression of depth, allowing the specimen to express both brightness and visual substance without relying on a polished surface. Its appeal develops through this meeting of colour, relief and reflection. From a distance, the red establishes a bold identity. Viewed closely, the textured exterior reveals a more intricate landscape, where small reflective planes and darker recesses give the stone its individual character. Presented in its rough, unpolished state, this diamond offers an expressive study in red. Its presence comes from the relationship between a vivid colour appearance and the varied surfaces that carry it, creating a specimen whose details reward attention beyond the first impression. Specifications: • Weight: 0.17 g • Weight in carats: 0.75 ct • Dimensions: 5.5 × 5 × 5 mm • Origin: Lunda Norte, Angola, according to the provenance information transmitted by the previous collector • Gem material: Natural diamond • Crystal form: Natural rough diamond • Morphology: Rounded to irregular natural form • Colour appearance: Vivid blood red with luminous red flashes • Colour distribution: Irregular, with areas of differing apparent intensity • Transparency: Translucent to opaque • Lustre: Adamantine • Surface features: Dense micro crystalline granular texture • Condition: Natural, unpolished • Treatment: Natural, but not laboratory tested • Documentation: This diamond is not accompanied by any type of document. Notable Points: • Vivid Blood Red Appearance A rich red appearance establishes the specimen’s immediate visual identity, with luminous scarlet highlights and deeper crimson passages contributing to its expressive palette. • Contrasting Red Tones Variations in apparent intensity give the colour depth, allowing brighter areas to stand out against darker contours and recesses. • Rounded to Irregular Natural Form An organic outline gives the specimen a sculptural character, with changing surface directions offering different compositions as the stone is viewed from several angles. • Intricate Surface Relief Fine granular areas, small ridges and uneven depressions create a detailed exterior that invites close examination. • Bright Adamantine Lustre Crisp reflections illuminate individual surface features, introducing brilliant highlights against the red background. • Numerous Reflective Planes Small angular surfaces catch the light independently, creating scattered points of sparkle across the rough exterior. • Expressive Light and Shadow Illuminated areas and shaded recesses work together to emphasise the surface relief and reinforce the specimen’s three dimensional presence. • Varied Light Transmission Translucent passages appear brighter, while more opaque areas retain a concentrated visual density, contributing to the range of red tones. • Preserved Rough Presentation The uncut, unpolished state allows the exterior texture and irregular contours to remain central to the specimen’s appeal. • Engaging Detail Under Magnification Close observation reveals intersecting surface features and small reflective areas that are less apparent in an overall view. • Strong Display Character The combination of red colour appearance, lustre and textured relief provides a clear focal point in a mineral display or close photographic study. • Angolan Provenance Lunda Norte, Angola, according to the provenance information transmitted by the previous collector. Collector’s Interest: This specimen offers a collecting interest centred on the relationship between red colour appearance and rough diamond texture. Its strongest visual quality is the way bright scarlet passages, deeper crimson areas and silvery reflections share the same irregular surface. The exterior gives the eye more to explore than colour alone. Fine granular details alternate with broader reflective planes, while changes in relief create small areas of shadow. These features give the specimen a layered appearance, with different details becoming prominent as its orientation changes. Its rounded to irregular form also lends itself to observation from several perspectives. The appeal is distributed across the exterior, allowing the collector to explore how shape, texture and illumination influence the appearance of the red. For a collection focused on rough diamonds, expressive colour appearances or richly textured mineral specimens, this piece offers a distinctive visual contribution. Its identity rests in the combination of colour, surface detail and unpolished form, with the documentation and treatment status stated in the specifications. 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. Preservation would retain the textured exterior and the relationship between its red appearance, reflective planes and irregular contours. These are the features that define its present visual character and make it engaging as a display specimen. A bespoke jewellery design accommodating the existing rough form could provide another presentation option. A setting that leaves the principal surfaces visible would allow the colour and texture to remain the focus while limiting alteration 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. 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