Iridescent Tear

Iridescent Tears were a low-level crafting material in Diablo III, obtained by making the Blacksmith salvage rare weapons and armor. Each item with an item level of 1-60 salvaged would yield 1 Iridescent Tear. They could be stacked up to a maximum of 5000. Iridescent Tear, along with Exquisite Essence and Fiery Brimstone, were the only crafting materials that were not account bound.

As of patch 2.3, they are no longer obtainable.

"Artisans through the ages have relied on rare materials to enhance and create powerful items."