the.com/anglesite

Lead's way of rusting — a sulfate crust that quietly mummifies old galena.

means A lead sulfate mineral (PbSO₄) that forms when galena weathers and oxidizes, usually appearing as pale, glassy crystals or crusts around old lead ore.

from Named for the Isle of Anglesey, off the coast of Wales, where the mineral was first identified in the early 1800s among the weathered lead ores of the island's mines — a straightforward place-name christening, the '-ite' suffix simply marking it as a mineral of that ground.

formula
lead sulfate, PbSO4
origin
named after Anglesey, Wales, 1832
density
so heavy it feels fake in hand
use
minor ore of lead and a gem for collectors
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