To make the green sword in Roblox Islands, you generally need to craft it from the game’s sword progression, and the most relevant public references point to the Aquamarine Sword and related weapon crafting rather than a single universally named “green sword.” The Aquamarine Sword is crafted with 200 Aquamarine shards and 2 pearls in an anvil.

What to do

  • Get to the lake area and mine Aquamarine rocks for shards.
  • Fish for pearls , often using bait to improve your odds.
  • Use an anvil to craft the sword once you have the materials.

If you meant a different green sword

Some players use “green sword” to refer to a weapon skin, an older item, or just the Aquamarine Sword because of its green-blue look. The public sources I found most clearly describe the Aquamarine Sword, not a separate item officially called “green sword.”

Fastest route

  • Upgrade your pickaxe first so shard mining goes faster.
  • Fish with bait if possible.
  • Gather the full 200 shards before focusing on the pearls, since shards take longer.

Practical note

If you want, I can also turn this into a super short step-by-step checklist for the exact sword you’re looking for.