First fireclay in 130 hour save file

[Dio L]

First time finding fireclay in my 130 hour world  I stopped even thinking about finding naturally generated fireclay once I figured out you could craft it. I live in a massive bauxite/lime biome and I SCOURED the area for fireclay at some point in my first year without ever finding anything, so I gave up. Cut to 100+ hours later and I found a pretty good size deposit underground while caving, still the only fireclay I've ever found in this world. I thought fireclay was a myth...