Block of Wootz
Nine wootz ingots, kept as plain steel: the block keeps no pattern.
kindblockcreative tabFluxion: Materials
Currents
Alloy27
Lattice3What the Loupe reads: 30 in all. The game works them out from its recipes. Wheel of Currents
In the Codex
Entry 
Wootz — Steel with currents frozen in its waves. Study Weavings and Brightsteel.