Rock alum

Related to Rock alum: Alum stone, Alum Rock Park
Same as Roche alum.

See also: Rock

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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The 30 Rock alum was last arrested in 2014 after he argued with cops and could not produce ID when they pulled him over for riding his bike the wrong way on Fifth Avenue in Manhattan.
Because it's a naturally occurring rock alum there are no harsh chemicals and aluminium derivatives (which are absorbed by the body) or parabens.