organic material is expensive to fabricate and minerals or anything made from material found in the ground is oddly easy to replicated (does make sense that orgainic material would have a more complicated structure but that theory falls apart when u look at fabricating whole machines or whole mid/high quality solar panels ) its something about ic2 checks worldgen and metals/minerals are very much more plentiful to it apparently , reguardless i hope the ic2 devs fix/have fixed the calculations for what some items cost , any mob drop including a pearl should not cost more then iridium per unit