Slate gravel

block game:gravel-slate · from betterruins

Used in (2)

Filters

Recipe	Category	Ingredients → output
Dry dirty gravel (Plain) (Item Recipe)	grid	Slate gravel + soil-slate-none → Dry dirty gravel (Plain) ×2
muddygravel	barrel	Water ×1L + Slate gravel → Muddy gravel

Found in structures (1)

Structure	Kind
desertspecifc-o20-stadrian-undergroundwithentrance	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.