Description: This remarkable tricolour Tourmaline from Minas Gerais, Brazil, stands out for the exceptional harmony and rarity of its natural colour combination. Within a single well formed prismatic crystal, the eye can follow a refined progression from Mint Green at the base, through a luminous Blue Green central zone, and finally into a deeper Petrol Blue to Midnight Blue upper section. It is precisely this elegant chromatic sequence, combined with the crystal’s strong internal brightness and natural structure, that gives the specimen its individuality and collector appeal. The lower section begins in a fresh Mint Green tone with a bright and crystalline appearance. Under transmitted light, this area becomes even more vivid, transforming into an intense Neon Green that immediately energises the whole crystal. This luminous reaction gives the base a fresh and vibrant character, while also highlighting the excellent light transmission within the specimen. Above this green foundation, the colour gradually evolves into a cooler Blue Green zone. Rather than appearing abrupt, the transition is natural and fluid, creating a beautiful intermediate stage between the green base and the darker upper section. When illuminated from behind, this central area intensifies visibly and develops into a rich Dark Aqua Blue, adding further depth and sophistication to the crystal’s overall chromatic architecture. The upper portion displays the deepest colour concentration of the specimen, shifting into Petrol Blue with strong Midnight Blue character. This darker crown gives the crystal a sense of visual gravity and contrast, anchoring the composition while preserving transparency and brilliance. Under stronger illumination, subtle internal flashes emerge within this upper zone, reinforcing the richness of the colour and the depth of the crystal. Morphologically, the specimen presents a very attractive natural prismatic habit with clean, well defined faces and strong vertical structure. Fine longitudinal striations remain clearly visible along the prism faces, recording the natural growth of the crystal and adding an important mineralogical dimension to its beauty. These natural linear features interact strongly with light and produce elegant reflective effects across the surface. The crystal also benefits from notable internal luminosity. Light enters the body effectively and activates the different colour zones, allowing the specimen to reveal not just colour, but movement, depth and internal life. The result is a Tourmaline whose appeal lies equally in its rare tricolour composition, its neon transformation under backlighting, and its preserved natural crystal form. This is a particularly expressive Brazilian Tourmaline, where colour variety, transparency, prismatic geometry and optical response come together in a refined and highly collectable natural crystal. Specifications: • Weight: 0.19 g • Weight in carats: 0.95 ct • Dimensions: 6.5 × 3.5 × 3.5 mm • Origin: Minas Gerais, Brazil • Mineral species: Tourmaline • Variety: Tricolour Tourmaline • Crystal system: Trigonal • Crystal habit: Natural prismatic crystal • Morphology: Upright prism with well defined faces • Colour sequence: Mint Green, Blue Green, Petrol Blue to Midnight Blue • Colour response under transmitted light: Neon Green base, Dark Aqua Blue centre, intensified deep blue upper zone • Transparency: Transparent to translucent • Lustre: Vitreous • Surface features: Fine natural longitudinal growth striations • Internal features: Natural growth structures and minor inclusions • Treatment: None • Condition: Natural, untreated crystal Notable Points: • Rare natural tricolour composition A highly attractive progression from Mint Green through Blue Green into Petrol Blue and Midnight Blue. • Brilliant colour transformation under backlighting The Mint Green base becomes Neon Green, while the central zone intensifies into Dark Aqua Blue. • Deep upper Petrol Blue zone The top of the crystal displays the strongest and most concentrated colour, creating depth and contrast. • Strong internal luminosity Light penetrates the crystal effectively, activating the full chromatic range and revealing internal life. • Elegant natural colour transition The movement between the three principal colour zones remains fluid, balanced and naturally organised. • Attractive prismatic habit The specimen preserves a clean and well defined prism form with excellent visual presence. • Fine longitudinal striations Natural vertical lines along the prism faces record crystal growth and enhance mineralogical authenticity. • Vitreous lustre The surfaces reflect light cleanly and reinforce the transparency and brilliance of the specimen. • Excellent optical performance Different lighting conditions reveal new colour intensities and strengthen the individuality of the crystal. • Minas Gerais provenance Originating from one of the world’s most important localities for fine Tourmaline material. • Untreated natural specimen Its colour, structure and optical effects are entirely natural. Collector’s Interest: Tourmalines with clearly visible multiple colour stages are always desirable, especially when the transitions remain natural and the crystal preserves a strong prismatic morphology. This specimen is particularly appealing because the chromatic sequence is not limited to two colours, but develops through three distinct stages, giving it greater rarity and visual sophistication. Its vivid response under transmitted light adds another important level of desirability. The transformation into Neon Green and Dark Aqua Blue gives the crystal a far more dynamic presence than would be expected from a specimen of this size, while the deep Petrol Blue upper zone provides strong contrast and collector character. Lapidary Potential: Although the crystal contains attractive transparent areas and strong colour, its greatest value lies in the preservation of its natural form and complete tricolour architecture. Any cutting or reshaping would remove the prismatic habit, the longitudinal striations and the full visible progression from Mint Green to Blue Green to Petrol Blue. As a natural crystal, it offers a far richer visual and geological identity than any faceted result could preserve. ————- 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