Epolitna ores add several ores (currently three), and their armor/tool equivalents.
Mashite
Mashite is a purple ore and can be found between Y = -64 and Y = 12 in the overworld
The ore is very rare and only extractable with a diamond pickaxe.
The tools/armor are better than diamonds
Argon
Argon is a pretty common red nether ore that can be found betweet Y = 50 and Y = 150.
It can be used as a fuel, or used to craft an argon ingot, combined with 8 iron nuggets
With the argon ingot, you can craft argon armor (equivalent to iron, and grants fire resistance), and argon tools (equivalent to iron, burns struck entities)
Platinum
Platinum is a gray common ore found anywhere in the end/end cities
It is used to craft armor or tools, that have stats between iron and diamond
The platinum armor gives the wearer high knockback resistance.
Terbium
Terbium can be found above Y = 64.
Terbium armor improves mobility in several ways