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monster? you bet! otherkin.


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this is another of our favorites, and one of the inspirations (along with the nickel mineral annabergite) for our smol derg Kel's favorite colors being purple and green together. this is cobalt(2) orthoarsenate octahydrate: the mineral erythrite, which can be found in a range of pinkish to purple shades. annabergite is the corresponding nickel arsenate mineral and forms bright green crystals. these two minerals form through secondary alteration of cobalt and nickel arsenide and sulfarsenide minerals, the bright colors serving as visual hints to the presence of cobalt and nickel ores in the surrounding rocks—hence erythrite has acquired the nickname of "cobalt bloom" (annabergite is "nickel bloom") as though it were a colorful flower growing out of a vein of cobalt ore.

neat stuff huh? cobalt is probably one of the most colorful of the common metals, chemically speaking. in fact I can't think of a color of the rainbow that can't be coaxed out of some cobalt compound or other. cobalt complexes ended up being very instructive for that reason—the bewildering range of differently colored substances that could be gotten from cobalt complexes of water, ammonia, and chloride spawned a huge range of color-related names for cobalt complexes ("luteo" and "roseo" and "purpureo" and "praseo" and so forth) and better understanding of the geometry of octahedral metal complexes.

it's almost enough to make me believe that cobalt really is a magical substance—an inexhaustible supply of colorful chemical shinies for the kobolds to play with.

~Chara


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