Fluorite with Sphalerite

Denton Mine, Harris Creek Mining Sub-District, Hardin County, Illinois, USA

13 cm tall x 13 cm wide

Ex-collection Ross Lillie

Mined in 1991, this fluorite crystal appears as a triangular formation with two distinctive unusually sharp sphalerite crystals. It features a yellowish-gold transparent center with a rough, textured surface around the edges, which transitions to pale purplish tones. This gradation not only suggests the ever-changing nature of light and color in crystal formations but also adds depth and movement to the piece, enhancing its visual complexity. The fluorite presents a symmetrical shape with facet-like surfaces, evoking a sense of both natural beauty and geometric precision.

The story of Illinois is the story of fluorite; fluorite mining in Illinois begins in 1842 with the last mine closing in 1995. Fluorite was named the Illinois state mineral in 1965. From the earliest days up until the late 20th century, Illinois fluorite was often sold by the pound, merely as decorative colorful crystals. There were many dedicated collectors in and around Illinois who coveted these seemingly common specimens. Today we view them as arguably the finest fluorites the earth has ever revealed.