I have been slowly building up some Zoyas in my collection. Tosca, from their Classics line, is a really pretty bright red with a slight gold shimmer.
The formula on this was great. Tosca applied so evenly. You are looking at two beautifully easy coats. The gold shimmer is very subtle. You really don't pick it up except in bright sunlight. Unfortunately, my day was a little overcast, so I don't know if you can really see the shimmer, except in the bottle.