*Layer Composition* Layer 1 – Purple Amethyst Crystal Crown • Upper zone formed by well developed amethyst crystal terminations, showing saturated violet to lilac tones with natural growth faces and internal reflections. Layer 2 – White Quartz and Chalcedony Transition • Narrow milky to translucent silica layer acting as a visual and geological transition between the crystalline amethyst crown and the agate body. Layer 3 – Honey Yellow to Amber Agate • Broad band of microcrystalline silica displaying honey yellow, amber and soft golden tones, enriched by iron oxides and clearly visible under transmitted light. Layer 4 – Reddish Brown Iron Rich Agate Line • Thin but distinct iron rich band with reddish brown and rust coloured concentrations that sharply separates the upper agate from the lower zones. Layer 5 – Green to Cream Chalcedony Base • Basal agate and chalcedony layer with pale cream tones crossed by green mineral inclusions, forming the foundation of the piece and anchoring its colour structure. —————— Description: This specimen is a polished square slice extracted from a natural amethyst agate geode formed within volcanic cavities in Artigas, Uruguay. Unlike cylindrical sections, this rectangular prism form presents a flat vertical cross section that allows the internal stratigraphy of the geode to be read with exceptional clarity from top to base. The uppermost zone preserves a natural amethyst crystal crown, left completely untouched, displaying vivid purple crystal terminations with sharp faces and internal zoning. When illuminated from above, this crown reveals depth, clarity and subtle tonal variations within the amethyst crystals, characteristic of high quality Uruguayan material. Beneath the crystal zone, a pale quartz and chalcedony transition layer introduces the agate body. Under frontal and rear lighting, this layer appears softly translucent, acting as a luminous boundary that enhances the contrast between the crystalline amethyst and the banded agate below. The central body is dominated by honey yellow and amber agate bands. When light is introduced from behind at mid height, these layers become highly translucent, glowing with warm golden tones and revealing fine internal banding created by slow silica deposition enriched with iron bearing solutions. A thin reddish brown iron rich line cuts cleanly through this zone, adding geological definition and visual rhythm. The lower section consists of cream coloured chalcedony crossed by green mineral inclusions. Backlighting from the base accentuates these green zones, giving the specimen an almost landscape like appearance and completing a natural colour progression from violet to gold to green. The square slice format enhances the architectural quality of the piece, offering a precise and readable geological narrative while maintaining the raw authenticity of the amethyst crystal crown. Specifications: • Weight: 2.62 g • Weight in carats: 13.10 ct • Dimensions: 22 × 11 × 5 mm • Origin: Artigas, Uruguay • Material: Amethyst with natural agate and chalcedony banding • Transparency: Transparent to translucent in the amethyst and agate zones, opaque at the base • Treatment: None • Form: Polished square slice with natural crystal termination Notable Points: • Natural amethyst crystal crown preserved in its original form • Clear vertical exposure of multiple geological silica stages • Strong colour progression from purple to honey yellow to green • Distinct iron rich band separating agate zones • Exceptional response to transmitted and rear lighting • Sharp layer definition with no artificial enhancement • Completely natural material with no treatments or stabilisation • Flat faces allow optimal display and light interaction Collector’s Interest: Uruguayan amethyst agate slices are valued for their ability to present the internal architecture of a geode in a clean and legible format. Square slices with preserved crystal crowns are less common than standard sections and are particularly appreciated for their balance between natural formation and refined presentation. This specimen offers strong colour contrast, clear stratigraphy and excellent light response, making it a compelling addition to curated mineral collections. Lapidary Potential: This piece has been finished to maximise its visual and geological clarity. Any further cutting would compromise the integrity of the crystal crown and the continuity of the agate layers. Its highest value is fully realised as a display specimen, where its layered structure, colour transitions and interaction with light can be appreciated in full. ————— 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 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