• 石いし — stone; rock
• 宝石ほうせき — gemstone
• 石油せきゆ — oil; petroleum
• 磁石じしゃく — magnet
• 化石かせき — fossil
• 石段いしだん — stone steps
• 百ひゃく万まん石ごく — one million koku (old rice units; symbol of wealth or domain size)

The shape of “石” originally depicted a cliff and a small object — symbolizing a stone. It appears in science, nature, and even poetry. It also represents weight or durability in metaphors, and was historically used as a measurement unit in Japan (一石 ≈ 180L).

石いしを 集あつめるのが 好すきです。
I like collecting stones.

石いしの橋はしを 渡わたります。
I’ll cross the stone bridge.