Skip over navigation

Malachite: March 2013 Mineral of the Month

 

Realgar

 

Mineral Name: Malachite
Specimen Number: 019
Record ID: 5725
Locality Nickname: Bisbee, Arizona
State: Arizona
County: Cochise
City: Bisbee
Mining District: Warren
Original Locality 1: Arizona<
Original Locality 2: Bisbee
Min Dat Locality Page: http://www.mindat.org/loc-3296.html
   
Online page: http://ivyserver.princeton.edu/mineralcollection/detail.php?onlypic=0&id=5725&mineral=Malachite&keyword=
   
Search the Collection:

http://ivyserver.princeton.edu/mineralcollection/index.php

   
About the Collection: http://www.princeton.edu/geosciences/about/mineral-collection


Winter is drawing to a close in Princeton, so we thought a touch of green would be appropriate.  This month’s specimen is a marvelous sample of malachite (copper carbonate, Cu2(CO3)(OH)2.)  Malachite has been treasured since ancient times as a pigment and decorative material, for example, the famous vases in St. Petersberg’s Hermitage Museum.  Other well-known deposits occur in the Congo, Germany and Australia.  This specimen, however, is from the early days of copper mining in the Bisbee, Arizona district, donated by Princeton alum Cleveland Dodge, class of 1879.  The stalactitic forms and concentric bands are produced by precipitation from mineralized fluids in the area’s caves, which were once lined with thick masses of malachite and the related blue mineral azurite.  The mines have been closed for decades, and therefore existing Bisbee specimens are highly prized.