Core Keeper Codex
1.2.1.5 · verified 2026-09-07

Rusted Necklace

Common · item level 10

Rarity
Common
Item level
10
Base damage
—
Durability
—
Sell value
—
Stackable
No
Slot
Necklace
Object ID
8,829

What it grants while equipped

StatValueMultiplier
Mining Percentage Increase19—

These are the condition values the game applies. The files do not label their units, so the raw value is shown rather than a percentage sign that might be wrong.

Where to get it

Best source is Sea Biome Chest at 4.86% per kill — about 47 kills for a 9-in-10 chance.

SourceChance per killKills for 90%AmountNote
Sea Biome Chest4.86%
471
Large Jellyfish Destructable4.20%
541
Octarine Chest1.96%
1171guaranteed group

Crafting

IngredientAmount
Copper Bar10

Crafting time 1s.

Total raw materials

Every ingredient expanded down to things you cannot craft.

MaterialAmount
Copper Ore10

Internal name RustedNecklace. Components: AreaLevelAuthoring CooldownAuthoring EntityMonoBehaviourData GivesConditionsWhenEquippedAuthoring