Tier

Tier refers to a tool's base mining level, also known as its Material.

Tier 0 Materials (Stone-Tier)

 * Stone
 * Clay
 * Flint
 * Coal
 * Copper
 * Tin

Tier 1 Materials (Iron-Tier)

 * Iron
 * Gold
 * Aluminum
 * Bronze

Tier 2 Materials (Steel-Tier)

 * Steel
 * Vertiron
 * Stahlrot

Tier 3 Materials (Obsidian-Tier)

 * Obsidian