純金

1. Origins, structure, and basic meaning

• Structure: 純金, read じゅんきん, denotes gold of high purity that has not been alloyed with another metal.
• Basic usage: It names gold with no other metal mixed in, used for a small ornament or a scratch-prone sheet.

2. Common pitfalls and similar expressions

• Pure metal rather than golden color
  • It means high-purity gold not alloyed with other metals, not merely something golden in color.