Ores & Worldgen

Echocite Ore Echocite	Overworld (stone + deepslate), y −20…60 · drops Raw Echocite
Drumstone Ore Drumstone	Overworld, y −48…24 · drops Drumstone Shard
Silentite Ore Silentite	Deep Dark only, y −58…−8 · drops Silentite Crystal

All three need the matching pickaxe tier and respect Fortune.