каменное

stone, made of stone, hard and unfeeling

→ каменный
каменн stone + ое Neuter singular (nominative/accusative)
adjective · nominative / accusative, singular neuter Rare #40,533
stone, made of stone
RU: Это каменное здание.
EN: This is a stone building.
stone, hard and unfeeling Often used figuratively in the phrase каменное сердце, “heart of stone.”
RU: У него каменное сердце.
EN: He has a heart of stone.
Forms of каменный
MasculineFeminine
Singular каменный —

Каменное письмо?

A message in stone?

— Ушедшие (2008)

Каменное письмо.

A Letter in Stone.

— Ушедшие (2008)

Я думал, у тебя каменное сердце.

I thought you had a heart of stone.

Ты эгоист, у тебя каменное сердце.

You are selfish, you have a heart of stone.

— Сладкая жизнь (1960)