Basalt cobblestone

block survival:cobblestone-basalt · from game

Produced by (1)

Filters

Recipe	Category	Ingredients → output
grid recipe	grid	clay-* + Basalt stone → Basalt cobblestone ×2

Found in structures (3)

Structure	Kind
Resonance Archive	storystructure
megastructures-castlewalls-catnoir	structure
largeruins-0501-freianofvoid-o16	structure

This confirms the schematic(s) contain this code somewhere, not where or how many times -- the per-instance block-entity decoding used for tapestries isn't run for every content type.