Old School RuneScape Wiki
Old School RuneScape Wiki

Ammonite Crabs can be found on the most coastal areas and the most northern beaches of Fossil Island. They cannot be attacked by dwarf multicannons. They are popular among players for training.



Item Quantity Rarity GE market price
Bronze pickaxe.png Bronze pickaxe 1 Common 67
Iron pickaxe.png Iron pickaxe 1 Common 24


Item Quantity Rarity GE market price
Numulite 25.png Numulite 2–28 Common (27/175; 15%) 40–560
Unidentified small fossil.png Unidentified small fossil 1 Rare (3/350=0.86%) Not sold
Unidentified medium fossil.png Unidentified medium fossil 1 Rare (3/700=0.43%) Not sold
Unidentified large fossil.png Unidentified large fossil 1 Rare (3/875=0.34%) Not sold
Unidentified rare fossil.png Unidentified rare fossil 1 Very rare (3/3500=0.086%) Not sold


Item Quantity Rarity GE market price
Oyster.png Oyster 1–2 Common 86–172
Seaweed.png Seaweed 1–5 Common 45–225
Oyster pearl.png Oyster pearl 1 Common 108
Empty oyster.png Empty oyster 1 Common Not sold
Spinach roll.png Spinach roll 1 Uncommon Not sold
Knife.png Knife 1 Uncommon 98
Opal bolt tips 5.png Opal bolt tips 5 Uncommon 40
Iron ore.png Iron ore 1 Uncommon 173
Coal.png Coal 2 Uncommon 324
Copper ore.png Copper ore 3 Uncommon 285
Tin ore.png Tin ore 3 Uncommon 285
Fishing bait.png Fishing bait 1–10 Uncommon 4–40
Calcite.png Calcite 1 Rare [1] 20
Pyrophosphite.png Pyrophosphite 1 Rare [1] 71
Seaweed spore 5.png Seaweed spore 2 Rare 1,928
Volcanic ash.png Volcanic ash 1 Rare 68
Casket.png Casket 1 Rare 731
Clue scroll (easy).png Clue scroll (easy) 1 Rare Not sold
  1. 1.0 1.1 Calcite and pyrophosphite are always dropped together.

Gem drop table

In addition to the drops above, this monster has access to the gem drop table.

Show/hide gem drop table
Item Quantity Rarity GE market price
Uncut sapphire.png Uncut sapphire 1 Rare 455
Uncut emerald.png Uncut emerald 1 Rare 679
Uncut ruby.png Uncut ruby 1 Rare 1,249
Nature talisman.png Nature talisman 1 Very rare 744
Uncut diamond.png Uncut diamond 1 Very rare 2,627
Rune javelin.png Rune javelin 5 Very rare 875
Loop half of key.png Loop half of key 1 Very rare 10,307
Tooth half of key.png Tooth half of key 1 Very rare 10,840
Rune spear.png Rune spear 1 Very rare 11,933
Shield left half.png Shield left half 1 Very rare 65,697
Dragon spear.png Dragon spear 1 Very rare 37,226