Rebecca, an interesting duo from NARS I recently acquired is described as Kiwi / Amber with shimmer.
Looks quite intriguing doesn't it?
More than anything these shadows seem frosted with shimmer. Frosty pale iced green and frosty light reddened brown. The shadows are pigmented, but they are very sheer and fine.
I used my usual gosh primer, and layered the colors quite a few times but they went on very sheer. They are more or less a 'wash' as opposed to being intense and rich. I figure to get them to show up more vividly you can use them wet.
Personally I don't like this duo. The coloring is just wrong on me! The 'amber' made my eyes look red and sore, and the 'kiwi' just didn't show up enough. I just think it makes me look ill.
Maybe darker skin tones can pull these colors off, but I'm not sure it would be flattering on anyone.