Board Thread:Fiction Universe Discussion/@comment-9141454-20150625191138/@comment-9141454-20150626123745

So it means that we need to have at least 3 types of minerals sorted by availability:

a)Common - Like Ti, Al, Fe, etc. (Periodic elements and their standard particles, for ex. Si02) - These could be mined from almost e v e r y single asteroid/moon/planet/dinosaur/etc.

b)Rare - Found only on specific planets (for example Grinnon only on molten worlds)

c)Available only by synthesis - Which would consume incredible amounts of energy and in some causes time.