Amulet of conservation
|This amulet protects some of the possessions of its wearer from outright destruction, but not infallibly so.|
Wearing an amulet of conservation provides you with the conservation intrinsic, giving you a 90% chance to negate potion, scroll, and food item destruction. Bear in mind that this provides no defense against food-destruction through harpy attacks (they steal and eat the food rather than destroying it outright) or against equipment corrosion from acid attacks (you'd need the resist corrosion intrinsic for that).
Stacking this amulet with other sources of conservation or with items that provide the preservation intrinsic provides no further benefit; only the most effective source of item protection applies.
While this amulet provides no short-term combat advantages, losing items to item destruction is irritating at best and devastating at worst. When entering areas where fire or cold damage are common, conservation is almost necessary if you intend to keep any of the scrolls or potions you bring in or find along the way. That being said, feel free to swap it out when another amulet is called for, and as a general rule, avoid carrying more potions or scrolls than is necessary.
Amulets of conservation were retired in 0.15, along with item destruction.