Blue clay

item game:clay-blue · from betterruins

Can be formed into basic pottery items. shift + rightmouse click on the ground to begin clay forming.

Used in (2)

Filters

Recipe	Category	Ingredients → output
Red ceramic tile (blue center accent) (Item Recipe)	grid	Fired red ceramic shingle ×2 + chisel-* + hammer-* + Artisan's Blueprint + Blue clay → Red ceramic tile (blue center accent) ×4
PlugAndFeather Mold	clayforming	Blue clay → Raw blue clay splitter plug mold

Found in structures (3)

Structure	Kind
underground-common	structure
megastructures-giantcathedral-dampus	structure
largeruins-0405-vil-o7	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.