United States Strategic Metals, Fredericktown, Fredericktown Mining District, Madison County, Missouri, USA

Bright blue chalcanthite is a rarity from Missouri. I got this one from Art Hebrank (current as of 2017 curator/site administrator of the Missouri Mines State Historic Site) when he was with the Missouri Geological Survey. He collected a small batch of these post-mining specimens at Madison Mine.

© Kevin Conroy

This chalcanthite specimen is a post-mining mineral. Ex Art Hebrank.

© Kevin Conroy

The chalcanthite from Madison Mine is a post-mining mineral. Ex Art Hebrank.

© Kevin Conroy

This matrixless chalcanthite specimen is a post-mining mineral. Ex Art Hebrank.

© Kevin Conroy

Dark gray→black cubic galena xls on a black xln sphalerite matrix; 1 prominent galena cube shows sharply modified corners. A black, bladed xln sphalerite mass occurs on the specimen top. Sphalerite shows an orange LWUV fl response. Not the “prettiest,” but a rare locality specimen from an historic, obscure Missouri mine.

© Bill Hamel

A rare piece of post-mining chalcanthite from the Madison Mine in Missouri. I received this on October 3, 2019 from Jake's Minerals (Jake Slagle - Baltimore, Maryland).

© Alexander Wong

Mine #1 North - Madison Mine 1955 National Lead Company, Missouri Cobalt Company Township 33N Range 07E Section 15,16 (landgrant) Commodity - Lead, Copper, Cobalt, Iron, Nickel Map photo courtesy of Missouri Department of Natural Resources.

Mine #1 Madison Mine map showing diamond drill holes and details of ore bodies. Township 33N Range 07E Section 15, 16, 21, 22 (landgrant) Commodity - Lead, Cobalt, Copper, Iron, Nickel National Lead Co. , Missouri Cobalt Co. 1955 Map photo courtesy of Missouri Department of Natural Resources.

North American Lead Company Plant at Fredricktown, Madison County Missouri taken in 1904. Photo courtesy of Missouri Gen Web; Madison County.

Foundations and chimney of the former North American Lead Co. plant and smelter at Madison, as of January 2016.

View of the western side of the Madison Mine's mill foundations as of January 2016. This mill was used by National Lead Co. during the later operating period; the massive reinforced concrete foundations were left in place after the equipment and brick-and-metal structure were removed.

This label is from Jake's Minerals (Jake Slagle - Baltimore, Maryland). It says Montana, which should actually be Missouri.

© Alexander Wong