A pink or red mineral made of cobalt, arsenic, and oxygen that occurs in deposits near cobalt ores and is prized by mineral collectors.
From Greek 'erythros' (red) with the mineral suffix '-ite,' named for its characteristic pink-to-red coloration. It was formally identified as a distinct mineral in the 19th century.
Erythrite is sometimes called 'cobalt bloom' because it forms on cobalt ore deposits like a pink flower blooming on rocks—miners loved finding it because it pointed them toward valuable cobalt ores, making it both beautiful and economically useful.
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