Board Thread:Suggestions forum/@comment-26946666-20160327113959/@comment-26116279-20160328144833

There even being mithril in erebor is highly debatable since it is only vaguely hinted at and some people would argue the mithril relics in erebor came from moria (undoubtedly some did, but they would never have carried away enough to last them for half an age and still be able to forge new gates for minas anor). The white mountains hint is so vague that it could be said that the mithril for minas anor's gate could have come from the lonely mountain.