NOUN
- a reddish mineral consisting of hydrated cobalt arsenate in monoclinic crystalline form and used in coloring glass; usually found in veins bearing cobalt and arsenic
How To Use cobalt bloom In A Sentence
- It rusts in just the same way that iron rusts, and the rust is known as cobalt bloom, being nothing more than rust produced by the decay of this mineral smaltite. Cobalt Mineral Conditions
