IMHO, you would think that there would only be maybe one or two cups used during production and filming, given the filming angles and the time it actually appeared on screen; there are significant differences between both photos, which leads me to ask why really, any more than one or two would need to be made for the film? that and the fact that the gold finish on the inside of the cup is soooo much brighter than the outside (well before documented discovery of gold as a precious metal)...
Wouldn't gold tarnish/age the same on all the surfaces?
And the purported fact that ***** was a carpenter, accustomed to working with wood, why the grail would be constructed of something other than that, especially with the lack of other materials that weren't available or discovered yet...
I mean, we're talking Son of God times here, not San Fransisco in 1849...
During *****' time, doncha think the grail woulda been made out of something a bit more "everyday"?
Someone needs to scan pics of "The last supper" and figure out what may be close to accurate; Far as I know, gold may tarnish and lose its luster over time, but not to the point that is shown with these supposed "grail cup" photos...