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While flying across the map, I spotted an ore vein, Never having seen one before I thought I would share mining it with you.
There is now a chance of getting a Gem from ore veins since Epoch update 1.0.4 these gems are yet to have a use in game but Epoch report there will be a use for them soon.
Info from the Epoch wiki page:
Ore Veins (new in v1.0.2.4)
Ore types: Iron, Silver, Gold
These rock formations are located randomly around the map
Iron Ore Vein
Destroy the vein and salvage to receive a random amount of each. (a vein may have multiple types of ore when destroyed)(and now gems) Every player can salvage to receive a random amount of ores as well. You need a toolbox/crowbar to salvage the wreckage.
Smelting the ores requires a fireplace, water bottle, toolbox, Sledgehammer.