n. 金块, 贵金属块, 小块

[化] 熔核

[ noun ]
a solid lump of a precious metal (especially gold) as found in the earth
<noun.object>

Nugget \Nug"get\, n. [Earlier niggot, prob. for nigot, an ingot.
See {Ingot}.]
1. A lump; a mass, esp. a native lump of a precious metal;
as, a nugget of gold.

2. Something of value, usually found among many other less
valuable things; -- often used figuratively; as, a nugget
of useful information in a sea of data.
[PJC]