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09/27/09
more sulfates

There are a few more sulfates covered in mineralogy texts.   Bronchantite is formed by oxidation of copper sulfides in arid areas. It is green. Antlerite is similar to bronchantite but the crystals are more often tabular or fibrous. It is also green.

Glauberite is described as a double salt. It is found in arid areas such as Chile, the dry lakes of California, Egypt, Russia, and India. Its crystals form in salt deposits. It is gray, yellow, or colorless.

Alum is a sulfate with commercial applications. Its most recognizable form is in the styptic pencil.

Got a notice from MN DOT. My rock shop signs have to be replaced, even though to me they look new, to the tune of nearly one thousand dollars.Maybe I will reinvent the rock business, and myself.

 

http://www.oliviahoff.com



Posted by oh5/ojhoff at 5:28 PM CDT
Updated: 11/08/09 12:34 AM CST
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