**Complimentary Specimens** As a gesture of appreciation, winning lots with a final hammer price above €50 will include one small additional mineral offered entirely free of charge. ————— Description: If a fragment of still water could hold light within its own body, it would appear like this. This Paraíba Tourmaline expresses colour as a quiet, living presence. A soft aqua green tone rises through the crystal, gathering with subtle intensity near the base, where delicate nuances concentrate and create a natural gradient within the structure. The colour does not sit on the surface. It exists within the crystal, moving through it with clarity and calm depth. Formed within copper bearing pegmatitic environments, this elbaite crystal carries the elemental signature that defines Paraíba Tourmaline. Copper within the atomic structure gives life to the colour, creating an internal luminosity that is both natural and stable. This is not an effect created by light alone, but a direct expression of the crystal’s chemistry. The crystal presents a well defined prismatic habit with clean vertical growth striations extending along its length. The geometry is preserved and coherent, allowing the structure to be read clearly from multiple angles. Its proportions are compact and balanced, maintaining a complete and recognisable mineral form. Under neutral lighting, the body colour reveals a transparent aqua green with a gentle internal glow. When light passes through the crystal, the base becomes more expressive, revealing a concentration of colour that enhances the sense of depth. The behaviour of light confirms that the colour is intrinsic and stable. Natural internal features are visible within the crystal, marking its growth history and reinforcing its untreated state. These structures interact with light, creating a layered visual effect where transparency and internal texture coexist. The result is a piece that feels alive, with light moving through its interior in a controlled and natural way. Paraíba Tourmaline represents a rare intersection of chemistry and geological formation. Its identity is defined by the presence of copper within the crystal lattice, a feature found in only a limited number of environments worldwide. Each specimen carries that signature as part of its natural formation. This crystal stands as a complete and authentic example of that phenomenon. Its form is preserved, its colour is natural, and its presence is clear. This is Paraíba Tourmaline in its pure state. Specifications: • Weight: 0.18 g • Weight in carats: 0.90 ct • Dimensions: 7 × 4 × 4 mm • Origin: Paraíba, Brazil • Mineral species: Elbaite Tourmaline • Variety: Paraíba Tourmaline • Crystal system: Trigonal • Chemical composition: Sodium lithium aluminium borosilicate hydroxide • Chromophore: Copper with possible manganese contribution • Crystal habit: Natural prismatic crystal with vertical striations • Colour: Aqua green with subtle base concentration • Colour behaviour: Stable under neutral light with internal transmission • Transparency: Translucent to locally transparent • Lustre: Vitreous • Treatment: None • Condition: Natural, unpolished, untreated specimen Notable Points: • Authentic copper bearing Paraíba Tourmaline with visible internal colour distribution • Distinct aqua green body colour with natural chromatic concentration at the basal zone • Well preserved prismatic crystal with complete vertical development • Clear longitudinal striations indicating uninterrupted crystal growth • Slight basal irregularity consistent with natural detachment from matrix • Internal growth zoning visible through transparency • Localised inclusions enhancing depth without compromising structural readability • Balanced translucency allowing controlled light transmission • Clean prism geometry with stable axial alignment • No evidence of polishing or artificial surface alteration • Natural termination with minor surface texturing • Compact crystal retaining full mineralogical identity Collector’s Interest: Paraíba Tourmaline occupies a unique position within modern gemology due to its copper bearing chemistry. The presence of copper within the crystal lattice is a rare geological occurrence, giving rise to colours that are structurally embedded rather than superficially produced. Crystals that preserve both their natural form and internal clarity offer a direct connection to their geological origin. This specimen presents a complete prismatic structure with visible growth features, making it relevant for collectors who value both scientific integrity and aesthetic presence. Lapidary Potential: The internal transparency and colour distribution suggest that faceting could produce a small and visually appealing gemstone. However, cutting would remove the natural prismatic structure and erase the mineralogical identity of the crystal. Its highest value lies in its preserved natural form, where its structure and colour can be appreciated together as a complete geological expression. ————- 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