Legendary items are very rare items. Only the luckiest of players or Masters have great attempts for obtaining them.
Gem
Blood Diamond - 1/25,000,000 Per second
Legendary bar- Presumably 1/1M
Raw legendary fish- Presumably 1/M from any boat
Cooked version of Raw legendary Fish
Gold -
Helmet
Body
Legs
Gloves
Boots
- May be obtained from Chest and their counterpart Mimics