What level of designation is required for a non-keli item to become permitted for Shabbat use?

Synopsis

Multiple views: for items not normally designated for a use (stone to cover a barrel), permanent designation is needed. For items normally used that way (stone to crack nuts), one-time designation suffices. A third view requires a physical act of preparation.

Early Acharonim
Lenient
Strict
Lesser cited
Major authority

Discussion

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