Thanks so much for all your help ladies! I have made my decision! The Amethyst was nice, but not very versatile... the smoky quartz didn't have the same sparkle as the other two colours, and when I tried on the citrine and praseolite, the praseolite seemed to look better... I even had some customers that were near by comment and tell me the praseolite looked better than the citrine. Plus I think the citrine looks better in gold... since it's a warmer colour, maybe that's what was missing. Praseolite looks very nice in silver since it's a cooler colour.
Here are the photos:
http://s757.photobucket.com/albums/xx211/neverenoughbags/Tiffany Sparkler/
I would love to get the earrings and necklace...maybe on the next special occasion, DH can get them for me...