Why are some lux so inferior?

[spfun]

My lucky starts tend to have 2-3 silver/gold & 1 marble. Mining luxuries are the best imo.

 

[carbontaxes]

yeah Marble is pretty awesome especially for a builder. You get both the Wonder bonus as well as the Stoneworks option. It's actually probably "over powered" as a lux. Marble as Ramses

 

[Cicerosaurus]

Ivory is probably my favourite as I think it gives you a bonus constructing wonders, or maybe it used too. My next favourites are gold/silver as there is not concept of environmental damage and money is useful regardless of how you are trying to win.

I'm curious as to how you rationalise this- you don't seem to want environmental damage but ivory is the best?