OSRS Sailing Giant Clam Encounter Guide
© gamerblurb.com | Published on 11/23/2025 at 1:02 AM CST (USA)
The giant clam is one of the most rewarding ocean encounters, turning normal items into pearls you can add to your collection log. Here is a full guide so you know exactly how it works and how to get the best pearls fast.
How the Giant Clam Works
The giant clam appears as a random encounter while sailing. The first time you meet it, the shell is open. You give it an item, it keeps that item, and the clam sinks. The next time you find that same clam, it returns as closed with a pearl inside.
How Pearls Are Created
The size of the pearl is based on the value of the item you fed the clam. Higher value items make larger pearls. There are 11 total pearls from tiny to radiant. You can take the pearl and feed the next item immediately so you do not have to wait for another full encounter cycle.
Finding and Using the Clam
You will hear an encounter sound when it spawns nearby. Sail toward it and inspect it. If it is open, you can feed it. If it is closed, it is ready to reward you with a pearl. Click to claim it, then give the next item if you want to queue another transformation.
Feeding Rules and Warnings
The clam refuses pearls and spits them back. It only accepts non pearl items. When you put something inside, the game warns you that you cannot get that item back. Once placed inside, it is gone until it returns as a pearl later.
Pearl Value Ranges
Tiny pearl, item value 1 to 300
Small pearl, item value 360 to 1280
Shiny pearl, item value fixed around 2,500
Bright pearl, item value 3,600 to 8,000
Big pearl, item value 10,000 to 16,640
Huge pearl, item value 17,000 to 32,000
Enormous pearl, item value 20,527 to 83,000
Shimmering pearl, item value 100,000 to 140,000
Glistening pearl, item value 201,000 to 289,910
Brilliant pearl, item value 400,000 to 750,000
Radiant pearl, item value 950,000 plus
Using high value items is the fastest path to the biggest pearls. Don’t feed it a burb or it’ll deal 5 damage to you. The best alch profit right now comes from feeding a blessed spirit shield, which produces a high tier pearl with strong return value.
Extra Tips
Helpful Clam Habits
Always feed a new item as soon as you collect your pearl
Keep one inventory slot open for the pearl reward
Track the value of the items you use so you do not repeat pearls
Good Items for Each Tier
Low tier, cheap runes or bars
Mid tier, mid value armor or weapons
High tier, expensive shields or gear
Final Blurb
The giant clam is a simple loop that pays out long term. Feed it an item, find it later, and grab a pearl. Work through all 11 pearl sizes and fill your log while sailing normally. It is one of the easier collection tasks in the entire skill.
FAQ
How do I get a pearl from the giant clam
Feed it an item during the first encounter, then return when the closed version appears.
What controls the pearl size
The value of the item you give the clam sets the tier of pearl you get.
How many pearls exist
There are 11 pearls from tiny to radiant.
Can the clam take pearls
No, it spits them back at you.
Can I feed the next item immediately
Yes, you can feed your next item right after collecting your pearl.
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