<Nexus>
Traveler of the Multiverse
I had a couple random thoughts regarding Obsidian. First of all, I've noticed that health and happiness are pretty easy to come by in the Industrial and Modern Eras and I'd like to rein those in just a bit. Hospital and Medical Clinic have what seems to me to be unnecessary +1 from both Obsidian and Lead. I think we could take these off without it hurting gameplay at all.
Second, without these bonuses, there really isn't a reason for Obsidian to hang around after the Classical Era is over; it can serve as the resource requirement for Spearmen, Axemen, Light Swordsmen, and Heavy Horsemen, but that's all. I was thinking about having Obsidian go obsolete somewhere during the Medieval or Renaissance Eras -- Metallurgy seems like the best bet, as by that point you have Longbowmen or Arquebusiers that are superior to any unit that can be built with Obsidian only. (I also had a brief thought about Lead going obsolete in the Modern Era, but I realized we want to keep that around for nuclear stuff, so I'm not going to touch that.)
Civilopedia says:
This makes me sence for the +1"Obsidian is used in cardiac surgery, as well-crafted obsidian blades have a cutting edge many times sharper than high-quality steel surgical scalpels, with the edge of the blade being only about 3 nanometres wide. Even the sharpest metal knife has a jagged, irregular blade when viewed under a strong enough microscope. When examined under an electron microscope an obsidian blade is still smooth and even. One study found that obsidian produced narrower scars, fewer inflammatory cells, and less granulation tissue in a group of rats.
Obsidian is also used for ornamental purposes and as a gemstone. It possesses the property of presenting a different appearance according to the manner in which it is cut. When cut in one direction it is a beautiful jet black; when cut across another direction it is glistening gray. "Apache tears" are small rounded obsidian nuggets embedded within a grayish-white perlite matrix."
Regarding lead: This is actually not a health bonus increment, rather an unhealth penalty reduction. Lead is unhealthy, but modern health care can handle it.
You may change these if you insist, but IMO it is better to leave them as they are; though it is not a big issue.