What are the most commonly known metals, rocks, crystals, minerals, glass types, polymers and soils on Ramath-lehi? Which are the most useful ones? What are their attributes? What hardness do they have? What are the most sought after objects - Rariora - on Ramath-lehi? Things that make you think of ancient tombs and boobytraps, adventurers and so on and so forth. Are there any (irl) commonly known (irl), "sci-fi" or "fantasy" (metals/crystals) on Ramath-lehi?