黒鉛

1. Origins, structure, and basic meaning

• Structure: 黒鉛 is read as こくえん and means “graphite”.
• Basic usage: It refers to a graphite specimen and graphite used to draw a line that is smudged by hand.

2. Common pitfalls and similar expressions

• 黒鉛の標本 / 黒鉛で描く
  • Use 黒鉛の標本 for a specimen and 黒鉛で描く for graphite as the drawing medium.