cobalt bloom

American  

noun

Mineralogy.

1. erythrite

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cobalt bloom British  

noun

1. another name for erythrite

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Etymology

Origin of cobalt bloom

First recorded in 1770–80

Example Sentences

He had read a geologist's report of cobalt bloom staining on rocks along Great Bear's shore�a sign of silver, and possibly of gold and copper.

From Time Magazine Archive

As I looked over the shore, I noticed a great wall there was stained with cobalt bloom.

From Time Magazine Archive

Figuring that the converse should be true, he packed a Geiger counter and pushed up the Roxey Creek valley, 120 miles north of Vancouver, where fallen rock bearing cobalt "bloom" lay in the creek bed.

From Time Magazine Archive

A popular term for a brightÐhued variety of some minerals; as, the roseÐred cobalt bloom.

From Webster's Unabridged Dictionary (2nd 100 Pages) by Webster, Noah

Under weathering conditions these minerals oxidize readily to form asbolite, a mixture of cobalt and manganese oxides, and the pink arsenate, erythrite or "cobalt bloom."

From The Economic Aspect of Geology by Leith, C. K. (Charles Kenneth)