| 5714 11btrmnr ((COQUIMBITE, ALUNOGEN)), $20 MINIMUM BID, Javier Mine, Ayacucho Department, Peru, 7 x 6.5 x 5 cm, Cabinet, | |
 | Here is a water soluble purple species, Coquimbite, an iron sulphate. These excellent specimens came from a find in Peru 5 years ago. The white is Alunogen. |
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