# Fragile
Fragile items are destroyed when thrown, kicked, hit with a force bolt or wand of striking, or dropped from a height (from levitating, riding or down stairs).
Items in your inventory are safe from shattering.
The following items are fragile:[1]

Eggs
Potions
Expensive cameras
Cream pies
Melons
Venom
All items made of glass, except artifacts and pieces of colored glass:
Mirrors (except the Magic Mirror of Merlin)
Pairs of lenses (except the Eyes of the Overworld)
Crystal balls (except the Orb of Fate and the Orb of Detection)
Wands whose randomized appearance is "glass" or "crystal"
Crystal plate mail
Breaking eggs that you have laid or mirrors carries a Luck penalty. 
Fragile items inside containers can break when the container is kicked, thrown, or otherwise abused. However, the algorithm used in this case is slightly different: cameras, melons, and pies will never break, eggs have a 1⁄3 chance of being damaged, and other fragile objects have a 67% chance.[2] For stackable items, each damaged stack will lose only one item. Items inside a bag of holding or a nested bag are immune.

References

↑ breaktest in dothrow.c

↑ container_impact_dmg in dokick.c

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