Minium is a RARE secondary alteration product of lead. This brick-red specimen is SOLID minium, either as microcrystals or in massive form. Sparkly lead microcrystals RICHLY cover one face and are scattered on other faces and in vugs on this rare mineral from a very UNCOMMON Utah locality - the iron mines near Cedar City. The iron mines operated from 1851 through the 1980s. Ex. Charles Hansen Collection, a noted California collector. Hefty for the size (lead, of course) at 303 grams or 10.7 ounces.