Quicksilver

Quicksilver is a reagent.

Source
Quicksilver can be purchased from vendors, obtained as a drop, or gathered.

Vendor
Quicksilver can be purchased for from the following vendors:
 * Engerrand - Limsa Lominsa Lower Decks
 * O'rhoyod - Old Gridania
 * Fridurih - Ul'dah - Steps of Thal
 * Pasdevillet - The Pillars
 * Traveling Material Supplier - The Azim Steppe
 * Shirakashi - Kugane

Quicksilver can be purchased for 1 from the following vendors:
 * Kobold Vendor - Outer La Noscea

Crafting
Quicksilver can be crafted by alchemists as a level 1 recipe with the following materials:
 * x2
 * x1

Uses
Quicksilver is used in crafting the following items: