**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: Like a vertical flame frozen in sapphire light, this blue kyanite rises with a quiet authority that immediately separates it from common market material. It does not merely present colour, it channels it upward, as though the crystal were conducting light along its entire length. This is a remarkably clean and structurally coherent blue kyanite crystal, displaying an elongated prismatic to blade-like habit with exceptional vertical definition. Unlike many commercially available specimens, which often show heavy matrix intergrowth, fractures or lateral distortion, this piece stands almost entirely free of intrusive mineral contamination. Only a minimal attachment near the lower section remains, discreet and natural, without compromising the integrity of the crystal body. The colour is a strong, saturated blue of notable purity. It avoids the greyish dullness frequently seen in lower grade material and instead holds a luminous mid to deep sapphire tone. Under backlighting, the crystal reveals one of its most compelling features: internal vertical fibrous structures that appear like rising currents within the stone. These internal linear formations run parallel to the growth axis, reinforcing both the anisotropic character of kyanite and the directional pressure under which it formed. Light interacts dynamically with the longitudinal striations that define the external faces. These natural growth lines are sharp, consistent and uninterrupted along most of the length, giving the crystal a disciplined architectural presence. The termination is natural and consistent with kyanite morphology, showing no evidence of polishing or artificial shaping. Mineralogically, kyanite forms under high pressure metamorphic conditions and is well known for its strong directional cleavage and pronounced anisotropy. High quality, elongated crystals with this degree of cleanliness and internal optical behaviour are considerably less common than fragmentary or heavily included examples. Brazilian material from Morro Redondo, Minas Gerais, has long been respected for producing some of the finest blue kyanite specimens in terms of colour and crystal development. Despite its slender proportions, this crystal commands presence through purity of form, chromatic strength and structural legibility. It is not decorative in a superficial sense. It is geological tension made visible. SPECIFICATIONS: • Weight: 3.70 g • Weight in carats: 18.50 ct • Dimensions: 45 × 10 × 3.5 mm • Origin: Morro Redondo, Minas Gerais, Brazil • Mineral species: Kyanite • Crystal system: Triclinic • Crystal habit: Elongated prismatic to blade-like crystal • Colour: Intense sapphire blue • Colour distribution: Vertically aligned with natural internal zoning • Transparency: Translucent to locally semi transparent under backlighting • Lustre: Vitreous to slightly silky along striated faces • Surface features: Well defined longitudinal growth striations • Internal features: Vertical fibrous structures visible under transmitted light • Condition and treatment: Natural, unpolished, untreated NOTABLE POINTS: • Exceptionally clean blue kyanite crystal • Minimal matrix presence confined to lower section • Strong, uninterrupted elongated habit • Saturated sapphire blue tone superior to common market material • Excellent internal vertical fibre visibility under backlighting • Clear anisotropic growth expression • Well preserved longitudinal striations • Natural termination with no mechanical alteration • Brazilian material, likely Minas Gerais • Highly readable metamorphic growth structure • Slender proportions with strong visual impact • No polishing, no treatments, fully natural state COLLECTOR’S INTEREST: For collectors, this specimen stands distinctly above typical commercial blue kyanite. Its clarity of form, structural cleanliness and luminous internal behaviour elevate it from decorative mineral to reference quality example. Elongated crystals of this integrity, particularly when free from heavy matrix intergrowth, are increasingly difficult to source. Brazilian kyanite remains highly regarded within metamorphic mineral collections, and specimens that combine strong colour saturation with structural legibility offer long term desirability beyond aesthetic appeal. This crystal speaks to those who value formation mechanics as much as colour intensity. LAPIDARY POTENTIAL: Although the colour and translucency might suggest selective lapidary interest, kyanite’s pronounced directional cleavage and anisotropy present significant cutting challenges. Any intervention would irreversibly compromise the crystal’s elongated morphology and internal structural features. Its highest value lies in preservation, where the vertical optical flow, natural growth striations and metamorphic narrative remain fully intact. _____________ Shipping and Handling: All orders are shipped by Portuguese National Post. • Dispatch time: within 1 to 3 business days after payment confirmation to Catawiki • Transit time with CTT service: between 5 to 7 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