Ambiguous Eolith

 is considered a common Curiosity item. It can be bought or sold at Shops.

Item description
"A thinking creature made this, or the sea made this; or both."

Obtaining
 can be obtained in many interactions and events while playing the game. For all the locations go the Item list page.

Sources
 * buy at Mount Palmerston shops for 35 echoes or Anthe for 30 echoes
 * find in the Church of the Starved Men inside the Shattered Citadel on Godfall
 * Obtained randomly in the The Wisp-Ways at SS generic portgaz.png The Mangrove College
 * Buy at Carlisle's Haven (Irem) for 1 secret

Usage
 has the following uses: Places to sell
 * Might be needed in the Shattered Citadel to open the Gate of Forms.
 * 3 can be used to in exchange for an Extraordinary Implication at the Chapel of Lights, provided Another Day > 50 and you have Something Awaits You.
 * 2 can be used to when you're In Pursuit of Three Flavours to make a Cigar at Rosegate.
 * One is needed to fulfil the Principles' End: A Little Flint objective during The Pulse of the Principles in Port Cecil.
 * The University: May net you either 1 or 70 Echoes, with 50% chance of each, averaging 35.5 echoes per unit.