Soul Stone

Sell value
30 Gold

What drops it

 * Shiro'ken Warrior
 * Shiro'ken Ranger
 * Shiro'ken Monk
 * Shiro'ken Necromancer
 * Shiro'ken Mesmer
 * Shiro'ken Elementalist
 * Shiro'ken Assassin
 * Shiro'ken Ritualist
 * Bound Vizu

Common crafting materials

 * 3-4 Granite Slabs

Rare crafting materials

 * 1 Lump of Charcoal

Testing
In a trial of 50 Soul Stones salvaged using a Superior Salvage Kit, 162 Granite Slabs and 6 Lumps of Charcoal were produced. A loss was recorded: for maximum profit, just sell them to the merchant.

Trivia

 * The soul stone may be a refrence to the soul stones used by the Eldar in the Warhammer 40,000 tabletop game. The Eldar soulstones are also used to animate automatons much like these soul stones animate the Shiro'ken.