Vivianite

Vivianite is a stone.

Source
Vivianite can be obtained from company airship and company submersible exploratory voyages.
 * Sector 01, Sea of Clouds
 * Sector 02, Sea of Clouds
 * Deep-sea Site 1, Deep-sea Site
 * The Lightless Basin, Deep-sea Site
 * The Southern Rimilala Trench, Deep-sea Site
 * Deep-sea Site 4, Deep-sea Site
 * Kanayama, Deep-sea Site
 * Purgatory, Deep-sea Site
 * The Southern Charnel Trench, Sea of Ash
 * The Central Charnel Trench, Sea of Ash

Uses
Vivianite is used in crafting the following items: