Geospecimen
Object number2010.103.1
OriginParadox Valley, CO
MediumCaronite
Credit LineJoel O. Lubenau & Phil Egidi
DescriptionLarge gray rock with yellow and orange (carnotite) throughout.Dimensions5.25 x 3.5 x 8.5 in. (13.3 x 8.9 x 21.6 cm)Historical NotesCarnotite is a bright to greenish yellow mineral that occurs typically as crusts and flakes in sandstones. Amounts as low as one percent will color the sandstone a bright yellow. The high uranium content makes carnotite an important uranium ore and also radioactive. Standard Chemical Company (SCC) processed Carnotite to extract radium. SCC was founded by two Pittsburgh entrepreneurs, James and Joseph Flannery, in 1911. Their production plants in Canonsburg and Pittsburgh were visited by Marie Curie in her 1921 visit. This specimen was mined in Paradox Valley, Colorado.
Related institution
Standard Chemical Company
Related person
James J. Flannery
Related person
Joseph Flannery
Subjects
On View
Not on view
2010
c. 1900
Allegheny Arsenal
Stella Marrs
Aluminum Company of America
