Fluorite from USA, Illinois, Hardin County, Cave-in-Rock Mining Sub-District

A striking combination specimen (Old Stock) from the Foster Mine, Cave‑in‑Rock Mining Sub‑District, Hardin County, Illinois, featuring sharply defined purple fluorite perched on a bed of druzy smoky quartz. The fluorite displays crisp cubic geometry with smooth, lustrous faces and a rich violet tone that deepens toward the center. Across the quartz surface, delicate hematite micro‑crystals create subtle red metallic flashes — a classic late‑stage association in this district. These platelets add contrast, texture, and paragenetic interest, enhancing the overall aesthetic of the piece.

This is a refined, character‑rich miniature showcasing three distinct mineral phases in harmony: fluorite, smoky quartz, and hematite. A beautiful example of the complexity and color that make Cave‑in‑Rock specimens so collectible.