Radical 钅
10 strokes

gold 钅 (278a) + ravine
(746a) = lead 铅
This is lead, the metal (not “lead” as in “to lead the way”).
铅笔 (454) qiānbǐ pencil

The pirates store their gold in the ravine, because there (in the gloom) it looks like lead. / [DIY pronunciation]