Nugget

(n.) A lump; a mass, esp. a native lump of a precious metal; as, a nugget of gold.

Thesaurus Entries

bar, batch, block, bulk, bullion, chunk, clod, clump, coin gold, coin silver, copper, gob, gold, gold nugget, hunch, hunk, ingot, loaf, lump, mass, nickel, pat, precious metals, quantity, silver, wad, yellow stuff