

Barite and Calcite from the Minerva No. 1 Mine, Cave-In-Rock, Illinois
This very delicate and aesthetic specimen is from the historic Minerva No. 1 Mine in the Illinois-Kentucky Fluorspar District of Southern...


UV Flashlights - Outlandish Claims of Power
I’m really getting tired of all the BS out there. Chinese vendors make outlandish claims about their flashlights and non-technical...


Rare Fluorite from the Crystal Mine, Cave-In-Rock, Hardin County, Illinois
The Crystal Mine, one of many fluorspar mines in the historic Cave-In-Rock mining district of Southern Illinois, is not a well-known...


Sphalerite, Ophir Hill Mine, Tooele County, Utah
Sawn slab of zinc ore consisting of sphalerite, galena, and other unidentified minerals, from the Ophir Hill Mine, Tooele County, Utah. ...