Blue dragon egg is a very rare drop that can be obtained by killing blue dragons. The egg can be checked at level 92 Farming to get a blue dragon. Though both a checked and unchecked dragon may be traded freely between players, only the unchecked variant can be sold on the Grand Exchange.
Upon obtaining an unchecked dragon egg the player receives the following message in chat: The dragon leaves an egg behind.
Dying with a checked dragon in one's inventory will result in permanent loss of the dragon.
For an exhaustive list of all known sources for this item, see here
- ^ There is further information on this drop; see the associated page for details.
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