**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: Emerging as a compact yet striking assembly of intergrown cubes, this vivid yellow fluorite from Moscona Mine presents a luminous and highly readable crystallographic structure. The specimen is composed of multiple cubic crystals tightly aggregated together, forming a clustered architecture where each cube contributes to a cohesive and visually dynamic whole. The colour is immediately captivating. A rich canary yellow dominates the specimen, displaying a bright and energetic tone that intensifies dramatically under transmitted light. When illuminated from behind, the fluorite reveals a glowing internal body, shifting towards a more saturated and almost radiant lemon hue. This strong light interaction enhances the perception of depth within the crystal cluster and brings forward subtle internal features. The cubic morphology is clearly expressed throughout the specimen. Individual crystals display well defined faces and sharp geometric transitions, with several cubes exhibiting stepped growth patterns. These formations create a layered, almost architectural effect, where smaller cubes appear to emerge from or overlap larger ones in a natural sequence of crystallisation. On closer inspection, certain crystal faces reveal fine internal cubic zoning and growth structures. These appear as subtle geometric patterns within the cubes themselves, following the same isometric symmetry as the external form. Rather than simple surface striations, these features reflect internal growth phases, adding an additional level of mineralogical interest and reinforcing the natural origin of the specimen. Transparency ranges from translucent to locally transparent, particularly along thinner edges and terminations, where light penetrates more freely. Small natural inclusions are present and scattered throughout the structure, further confirming the untreated nature of the piece without detracting from its overall visual clarity. The surface displays a consistent vitreous lustre, especially on the more preserved cubic faces, where light reflects cleanly and enhances the geometric definition. Minor natural irregularities and edge contacts are visible, consistent with extraction, but the overall structure remains well preserved and highly legible. Moscona Mine, located in Asturias, Spain, is internationally renowned for its fluorite specimens, particularly those with strong cubic development and vivid colouration. While violet varieties are more widely recognised, yellow fluorites of this intensity and structural clarity are less frequently encountered, making this specimen a compelling representation of the locality. This piece is defined not by size, but by light, geometry and colour intensity. Specifications • Weight: 5.77 g • Weight in carats: 28.85 ct • Dimensions: 24 × 15 × 14 mm • Origin: Moscona Mine, El Pontón de Solís, Asturias, Spain • Mineral species: Fluorite • Crystal system: Isometric • Crystal habit: Intergrown cubic cluster with stepped development • Colour: Canary yellow to intense lemon yellow • Colour distribution: Generally homogeneous with internal zoning visible under light • Transparency: Translucent to locally transparent • Lustre: Vitreous • Matrix: Minimal to absent • Condition: Natural, unpolished, untreated Notable Points: • Distinct canary yellow fluorite with strong colour intensity • Clearly defined cubic crystals in clustered formation • Intergrown structure with stepped crystal development • Internal cubic zoning visible within certain crystals • Strong response to transmitted light enhancing colour saturation • Good balance between translucency and structural readability • Natural inclusions confirming authenticity • Bright vitreous lustre across preserved crystal faces • Compact yet visually expressive three dimensional form • Classic Moscona Mine origin with recognised mineralogical significance • Less common yellow variety compared to typical violet specimens • Completely natural specimen with no treatment or polishing Collector’s Interest: Yellow fluorite from Moscona Mine occupies a distinct position within European mineral collections, particularly when it combines strong colour saturation with clearly defined cubic geometry. While the locality is widely known for its violet material, yellow specimens with this level of brightness and structural clarity are considerably less common. This piece offers a compelling balance between aesthetic appeal and mineralogical interest. The intergrowth of cubes, the internal zoning features and the strong interaction with light make it especially attractive for collectors who value both geometry and optical behaviour in fluorite. Its compact size enhances its versatility as a display specimen, while the clarity of its crystallographic features ensures it remains engaging even under close observation. Lapidary Potential: Although certain areas exhibit sufficient transparency for potential cutting, any lapidary intervention would compromise the natural cubic architecture that defines this specimen. The intergrown structure and visible internal growth features are integral to its identity. For this reason, the specimen is best preserved in its natural form, where its geometric precision, colour intensity and crystallisation history can be fully appreciated without alteration ————— 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