[quote=@Ghost Shadow]
Dragons were always described as having just naturally strong hides, except for their underbelly. Now, being dragon [b]lords[/b], it is entirely possible to say magic could come into play. I'm not saying it's a bad idea you've got. Just that it's a little confusing/tough to keep up with.
[/quote]

Think minecraft:

Gold shiny and expensive, but not good for using.
Iron/Steel strong and durable, but not exactly a sign of wealth.