rock soap

Noun

uncountable

A kind of clay with a smooth, greasy feel.

Japanese Meaning

滑らかで油っぽい感触を持つ一種の粘土

The sculptor carved a small bowl from a block of rock soap, appreciating its smooth, greasy texture.

彫刻家は、滑らかで油のような手触りのソープストーンの塊から小さな鉢を彫り出した。

Sense（1）

A kind of clay with a smooth, greasy feel.