Copper
A brown, shiny metal used heavily in electronics, a great conductor of both heat and electricity. Has a very high thermal conductivity, easily the best for common metals.
It is a spawnable non-flammable solid.
Here is a list of possible sizes that reach the maximum malleability (729) that have integer components: 1x729x1, 1x243x3, 1x81x9, 1x27x27, 3x81x3, 3x27x9, 9x9x9, 27x9x3
At its default size (4x1x2) it has a durability of 4, at its maximum size it has a durability of 19.
By default, its colour is #da8541.