真珠

1. Origins, structure, and basic meaning

• Structure: Spelling: 真珠. Reading: しんじゅ. Core meaning: pearl.
• Basic usage: Representative examples: 祖母から小さな真珠の耳飾りを譲り受けた / 貝の中に丸い真珠が育っていた.

2. Common pitfalls and similar expressions

• Gem versus its source
  • 真珠 refers to the rounded gem material formed inside a shell and to ornaments made from it. It does not mean the shellfish that produces the pearl.