No "mine" Icon?

I noticed, when trying to change the icon on a point I had marked on the map, that Gaia doesn't seem to have a symbol to mark a mine or mining claim with.  For prospectors, this would be a useful symbol to have.  I figured a symbol like this, with the crossed hammer and pick, would do.  This is an example from Wikipedia.

In any case, it would be nice to have, for that purpose.

Edit: Oh... I do see that there is a little icon of a miner's ore car (cart), but it still would be nice to have this alternative hammer & pick symbol.