The Island 4 update for The Forge introduces the Crimson Sakura Isles, a new region containing the Bamboo Cave. This area adds 13 distinct ores to the game, ranging from common materials to legendary finds with high multipliers. Mining these resources requires specific pickaxes capable of breaking the new node types found throughout the cave system.
Each ore offers different crafting statistics, including forge multipliers and potential passive traits for armor and weapons. Below is the complete list of ores available in the Bamboo Cave, their rarity, drop chances, and known effects.

Bamboo Cave Ore Stats and Locations
The following table details every ore found within the Bamboo Cave. Multipliers indicate the stat increase applied when the ore is used in forging. Drop chances represent the probability of obtaining the item from its specific source rock.
| Ore Name | Rarity | Multiplier | Drop Chance | Traits & Effects | Source Rocks |
|---|---|---|---|---|---|
| Bamboo | Uncommon | 4x | 1/6 | Armor: Swiftness (+3% movement speed) | Bamboo Pebble |
| Root Spire | Uncommon | 4.44x | 1/19 | None known | Bamboo Rock |
| Water Stone | Rare | 4.7x | 1/54 | Armor: Swiftness (+3% movement speed) | Bamboo Rock, Bamboo Boulder |
| Earthite | Rare | 5x | 1/84 | Armor: Vitality (+10% Health) | Bamboo Rock, Bamboo Boulder |
| Melonite | Rare | 5.2x | 1/100 | None known | Bamboo Rock |
| Rock Seed | Rare | 5.5x | 1/124 | Armor: Swiftness (+3% movement speed) | Bamboo Boulder, Hana Pebble |
| Wraith | Epic | 5.75x | 1/142 | None known | Bamboo Rock, Bamboo Boulder, Hana Pebble |
| Tiger's Eye | Epic | 6x | 1/210 | None known | Bamboo Rock |
| Shikanite | Epic | 6.15x | 1/213 | None known | Bamboo Pebble |
| Cyanite Jade | Epic | 6.5x | 1/242 | None known | Bamboo Boulder |
| Magit | Epic | 6.8x | 1/300 | None known | Bamboo Boulder |
| Duquack | Legendary | 8x | 1/450 | None known | Currently unknown |
| Onyx | Legendary | 10x | 1/900 | None known | Bamboo Rock, Bamboo Boulder, Hana Pebble, Glowy Rock |

Understanding Ore Traits
When forging gear in The Forge, specific ores apply passive traits to the finished item. These traits activate based on the percentage of the specific ore used in the recipe.
Activation Thresholds:
- 10% Composition: Using an ore as at least 10% of the recipe activates the trait, but often with reduced effectiveness.
- 30% Composition: Using an ore as 30% or more of the recipe unlocks the maximum stat bonuses listed above.
For example, to achieve the full +10% Health bonus from Earthite, the forging recipe must consist of at least 30% Earthite. Using less will result in a smaller health boost.

Requirements for Mining
Accessing the ores in the Crimson Sakura Isles generally requires upgraded equipment. Players must purchase the Bamboo Pickaxe or a higher-tier tool to effectively mine rocks in this region. Standard starter pickaxes may not have sufficient power to break open higher-level nodes like the Bamboo Boulder or Hana Pebble.
Rocks in The Forge replenish their HP over time. If a rock is partially mined and left alone, it will eventually reset. This mechanic can be used to "reroll" the contents of a rock if you check its contents (by damaging it) and decide the ore inside is not what you need.