Chests
Chests
Chests are collectible loot containers scattered across every island in Blox Fruits. Players can open a chest simply by touching it, whether by walking, jumping, or flying onto it.
Depending on the chest type, opening one rewards players with Money $, Fragments 
, Bones 
, or sea-exclusive items. Chests are not affected by the 2x Money Game Pass.
Some Third Sea chest locations can be found here.
Additional Information:
Chests give more money in higher seas (First Sea → Second Sea → Third Sea).
There are 6 chest rarities, with each higher rarity providing better rewards.
After being collected, chests respawn after a set time, with respawn time depending on their rarity.
Fragment
Second Sea: 100-200 Fragments
Does not respawn
Can only spawn on Treasure Island, Haunted Shipwreck, or Mirage Island (Second Sea and Third Sea only).
Silver
First Sea: $250-420
Second Sea: $500-1,000
Third Sea: $1,000-1,695
~3 minutes
Gold
First Sea: $600-1,100
Second Sea: $2,300-3,120
Third Sea: $3,875-5,200
~6 minutes
Diamond
First Sea: $1,500-3,000
Second Sea: $5,000-7,250
Third Sea: $8,000-12,250
~12 minutes
Mirage
Third Sea: $8,000-13,000
Does not respawn
Can only spawn on Mirage Island (Third Sea).
Fragment
Second Sea: 100-200 Fragments
Does not respawn
Can only spawn on Treasure Island, Haunted Shipwreck, or Mirage Island (Second Sea and Third Sea only).