[quote=TheSovereignGrave]
Um, I like the sheet overall but I don't think it's possible to have an iron-obsidian alloy. Obsidian's not a metal, and you don't forge obsidian. And I don't think it's possible to melt diamonds and sapphires with medieval-era technology.
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[quote=Cosmic Fury]
In other words, it's impossible to melt diamonds with medieval technology. Hell, it's hard (if not close to impossible) even with MODERN technology to melt them.Also, obsidian is glass. I personally wouldn't want to alloy ANYTHING with such a substance, as it would make it more brittle.
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Despite the details, it seems Hazmat's accepted it anyway. :rolleyes
If he wanted to use obsidian realistically, he could use it to make blades like a macuahuitl.

...I really need to finish my sheet.