No dupes to be found. Here are the shades Quartz, Graphite and Peridot compared to prior releases from Rococo Nail Apparel, Chanel and Dior.
The fall shades
Comparisons L to R: Rococo Nail Apparel R2T2, Chanel Trapeze, Chanel Quartz, Dior Silver Pearl, Chanel Graphite, Chanel Kaleidoscope, Chanel Peridot, Dior Timeless Gold
Swatches with 3 different views (since metallics look different depending on the light)
FYI: Polish Police has a comparison of Chanel Graphite to OPI Lucerne-tainly Look Marvelous. Those who think it's a dupe will see from her blog that it's really not :)