If you want to know how to calculate the theoretical quality of any two combined resources, the formula is:
((a * b) + (c * d)) / (b + d)
where
a is the quality of resource 1
b is the quantity of resource 1
c is the quality of resource 2, and
d is the quantity of resource 2.
so for instance if I have 7 each of Ronynium(412) and Ronynium(291), the formula would be
((291 * 7) + (412 * 7)) / (7 + 7) = 351.5
which rounds up to 352.
((a * b) + (c * d)) / (b + d)
where
a is the quality of resource 1
b is the quantity of resource 1
c is the quality of resource 2, and
d is the quantity of resource 2.
so for instance if I have 7 each of Ronynium(412) and Ronynium(291), the formula would be
((291 * 7) + (412 * 7)) / (7 + 7) = 351.5
which rounds up to 352.