Fluorescent Crater Agate Geode – UV-Reactive Chalcedony Quartz Specimen from Chubut, Argentina # B 7182

Features:

Primary Mineral: Agate
Secondary Minerals: Chalcedony, Quartz
Size: 3.5 x 3 inches
Weight: 257 g
Locality: Chubut Province, Argentina

This extraordinary crater agate geode from Chubut Province, Argentina, is a rare and visually dramatic variety of chalcedony quartz, formed within ancient rhyolite formations approximately 30–50 million years ago. It features a striking open "crater" structure lined with rich botryoidal formations in deep red to earthy tones, encircled by a vivid natural band of fiery orange chalcedony that creates a bold contrast against the darker outer matrix. The interior reveals smooth, rounded mineral growth patterns that showcase nature's slow and intricate crystallization process.

What makes this specimen truly exceptional is its fluorescence: it emits a glowing green response under ultraviolet light, adding an interactive and captivating dimension that transforms its appearance in different lighting conditions. Sourced from an elevation of around 2,000 feet, this unique geode highlights the geological history of Argentina's volcanic landscapes, making it highly desirable among collectors who value rare formations, strong color contrast, and UV-reactive minerals. It is equally suitable for display, décor, or curated mineral collections, all preserved in its completely natural and untreated state.

Crater agate, agate geode Argentina, chalcedony quartz geode, fluorescent agate, UV-reactive minerals, botryoidal agate, rare agate specimen, Argentina minerals, rhyolite geode, natural agate, collector mineral specimen, display mineral specimen