Description: This specimen presents a compact and well defined slice of green elbaite tourmaline from Minas Gerais, revealing a clear and minimalistic internal structure composed of two distinct zones. At the centre lies a colourless to slightly milky core, sharply outlined and occupying a stable position within the slice. This internal nucleus appears relatively clean and structurally coherent, allowing light to pass through with a soft diffusion rather than full transparency. Its presence provides a visual anchor that defines the entire zoning architecture. Surrounding this core is a saturated green outer zone, forming a continuous external layer with noticeable chromatic intensity. The green displays a range of tones from deeper forest hues under standard lighting to brighter, more vivid lime green when exposed to transmitted light. This outer zone remains translucent, allowing interaction with light while maintaining strong colour presence. The boundary between the two zones is clearly readable, forming a simple yet highly effective contrast between the neutral interior and the coloured exterior. Unlike more complex watermelon structures, this specimen expresses a cleaner and more restrained zoning system, focused on clarity rather than multiplicity. The overall shape is irregular and slightly asymmetric, suggesting that the slice originates from a crystal that developed in contact with adjacent material. Subtle distortions and uneven edges indicate natural growth interference, rather than post formation modification, reinforcing the geological authenticity of the piece. Under backlighting, the behaviour of the specimen changes significantly. The green outer zone becomes far more luminous and energetic, shifting toward bright, almost electric green tones, while the central core remains comparatively diffused and softer in appearance. This contrast enhances depth perception and highlights the internal structure with greater definition. Surface features include minor natural abrasions and growth related textures along the edges, consistent with a natural crystal section. No signs of polishing or artificial treatment are observed. Material from Minas Gerais is well known for its colour diversity and structural clarity in elbaite, and this piece represents a focused expression of that character through a simplified yet highly legible zoning pattern. Specifications: • Weight: 0.27 g • Weight in carats: 1.35 ct • Dimensions: 9 x 7 x 3 mm • Origin: Minas Gerais, Brazil • Mineral species: Tourmaline • Variety: Elbaite • Crystal system: Trigonal • Form: Natural crystal slice • Core structure: Single colourless to milky core • Colour zoning: Dual zone structure • Colour sequence: Colourless core, green outer zone • Transparency: Translucent to locally transparent • Lustre: Vitreous • Treatment: None • Condition: Natural, unpolished slice Notable Points: • Clean dual zoning structure with strong visual clarity • Well defined colourless central core • Saturated green outer zone with good chromatic intensity • Clear boundary between internal and external zones • Noticeable colour shift under transmitted light • Bright green response when backlit • Slight asymmetry indicating natural growth interference • Evidence of intergrowth or contact crystallisation • Natural edges with no polishing or reshaping • Subtle internal inclusions consistent with natural formation • Compact size with strong visual impact • Minas Gerais provenance, classic elbaite locality Collector’s Interest: This specimen appeals through its simplicity and clarity. Rather than relying on complex zoning or multiple colours, it presents a direct and easily readable structure where each element is clearly defined. The contrast between the neutral core and the saturated green outer zone gives the piece a strong visual identity, while the irregular outline adds geological character and authenticity. Collectors who appreciate structural honesty and clean zoning will find this type of material particularly satisfying. Additionally, the optical response under backlighting introduces a second visual dimension, making the specimen versatile both for display and photographic presentation. Lapidary Potential: While the material contains a well defined colour zone, its small size and irregular structure limit its suitability for cutting. Any attempt to reshape or polish the piece would compromise the natural zoning and remove the features that define its identity. Its highest value remains in its current form, where structure, colour and natural growth characteristics are fully preserved. ——————— 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 photos were taken under controlled light conditions, carefully selected to reproduce the most accurate natural color of each specimen. No filters, color enhancement, or artificial saturation were applied. The lighting setup is used exclusively to represent the piece as it appears under neutral daylight, ensuring that buyers can appreciate its true tones and luster without distortion. Identification and ethics: All specimens offered are guaranteed natural and as described. Their origin and mineral identification are provided with the most accurate and reliable information available. Every effort is made to ensure that each piece is presented with full transparency, avoiding any misleading details regarding its nature, treatment, or provenance. 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 a priority. In the event of any issue, such as loss, damage, or discrepancy, please contact us immediately through Catawiki’s messaging system. We will always find a fair and suitable solution, including refund, replacement, or other commercial arrangements whenever justified. Appreciation and commitment: We sincerely thank you for your trust and preference. Our goal is to continuously bring you some of the most beautiful, unique, and exceptional mineral specimens from around the world. Each piece is carefully selected for its quality and character, ensuring that every purchase meets the highest standards. Your satisfaction and confidence are our top priorities, and we will always strive to exceed your expectations with every order. With gratitude, GemPulse Minerals