These Gold Universe inserts from the 1997-98 Metal Universe can really give off some amazing colors in the right light, also highlighting their intricately etched foil. Just to illustrate what can be lost in a scan versus a picture, here's a scan of the card (scans of these always come out gold, as also evidenced on COMC)...
1997-98 Metal Universe Gold Universe No. 7 by
peaceful_garden, on Flickr
...and here are three different photographs of that same card:
1997-98 Metal Universe Gold Universe David Robinson No. 7 Photo Variations by
peaceful_garden, on Flickr