Copper

Adds copper weapons, tools, armor, and copper nuggets.
Copper can replace iron ingots/nuggets in some recipes.
Attributes: Lower than iron, higher than stone and leather items.

Silicon Bronze

Crafting: Copper Ingot + Diorite → Raw material, smelted in a Blast Furnace to produce Silicon Bronze Ingot.
Upgrade: Upgrade copper gear to silicon bronze gear via a Smithing Table (no template required).
Repair: Silicon Bronze gear can be repaired with copper ingots.
Recipe Replacement: Silicon Bronze Ingots replace iron in rails, minecarts, and cauldrons. Output doubles when using silicon bronze.
Attributes: Higher than iron, lower than diamond.

Vein Gold

Crafting: Gold Ingot + Nether Quartz → Raw material, smelted in a Blast Furnace to produce Vein Gold Ingot.
Upgrade: Upgrade gold gear to Vein Gold gear via a Smithing Table (no template required).
Repair: Vein Gold gear can be repaired with gold ingots.
Tools: Mining/damage equal to stone tools, mining speed/enchantability equal to gold tools, with higher durability.
Armor: Defense and enchantability equal to gold armor, but with higher toughness, durability, and pacifies Piglins.

Flam Iron

Crafting: Iron Ingot + Obsidian + Magma Block → Raw material, smelted in a Blast Furnace to produce Flam Iron Ingot.
Upgrade: Upgrade iron gear to Flam Iron gear via a Smithing Table (no template required).
Repair: Flam Iron gear can be repaired with iron ingots.
Attributes: Equal to diamond gear, but with higher durability.

MOD Compatibility

When MineColonies is installed:
Blacksmiths and Mechanics use copper and silicon bronze to replace iron in recipes.
Blacksmiths learn copper recipes at level 1, silicon bronze/vein gold at level 3, and flam iron at level 4 (no Blast Furnace required).