Copper
 

Where do i find copper ore.

Echo Cave.
Accessible through Sea of Greed, Forest of Tides and Sand Beach,

Copper
 

All im finding it the low quality copper ore

Then look in a higher-area cave.

Could you be more precise because I want higher Copper also but I dont know where the higher caves are located.

2 ways

1) mining in echo cave. Most of the time you will get low-quality copper ore, and from time to time med-qual and high-quality copper ores

2) Using a comper/decomper [production skill]
with a comper, you take the low-qual ore and you comp-them up to med/high qual
with a decomper you go to the next level of mines [one entrance in goblin camp, maybe one in moonlight tomb] and you decomp the low quality silver ore into high-quality copper ore.

copper ore 25%