Taken from the Arreat Summit Item basic info, http://classic.battle.net/diablo2exp/items/basics.shtml
Items and Gold Disappear after time when left on the ground
Don't leave items or gold lying on the ground any longer than necessary.
# Regular items and gold disappear after exactly 10 minutes.
# Magic items will disappear after 20 minutes.
# Rare, Set, Crafted, and Unique items will disappear after lying on the ground for 30 minutes.
# Rune Words (10 minutes)
# Gems and Runes (20 minutes)
[ Post edited by Dr.`disaster ]
Venture to the Realms Beyond to get off the beaten path.