9hlnawi ((POTASSIUM ALUM)), $1 MINIMUM BID, Alum Mine, Silver Peak, Esmeralda County, Nevada, 2 x 2 x 2 cm, Thumbnail, | |
A sulphate aka Alum-K This is a specimen from the Neil Wintrigham collection. Neil wrote the book on Maine minerals. ex Neil A Wintringham collection. |