MAC Shell Peach is a very warm-toned, light coral with a matte finish. It is a permanent eyeshadow that retails for $17.00 and contains 0.05 oz.
MAC Shell Peach Eyeshadow ($18.00 for 0.05 oz.) is a light-medium, peachy coral with moderate, warm undertones and a satin finish. It had sheer color coverage in the best case scenario; it was marginally better over an eyeshadow primer, but it was more of a subtle, diffusing shade than a practical all-over-the-lid kind of eyeshadow.
The consistency was ridiculously powdery and dry, so there was excess kicked up in the pan but also fallout during application. There were signs of fading after six hours of wear (from what I could tell).
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.
M·A·C Eyeshadow is a highly pigmented powder formula that applies evenly and blends well. Suitable for use either wet or dry, it's available in a wide variety of textures and finishes.
Talc, Zinc Stearate, Octyldodecyl Stearoyl Stearate, Isostearyl Neopentanoate, Tocopheryl Acetate, Caprylyl Glycol, Hexylene Glycol, Phenoxyethanol, [+/- Silica, Mica, Titanium Dioxide (Ci 77891), Iron Oxides (Ci 77491, Ci 77492, Ci 77499), Bismuth Oxychloride (Ci 77163), Blue 1 Lake (Ci 42090), Carmine (Ci 75470), Chromium Hydroxide Green (Ci 77289), Chromium Oxide Greens (Ci 77288), Ferric Ferrocyanide (Ci 77510), Manganese Violet (Ci 77742), Red 40 Lake (Ci 16035), Ultramarines (Ci 77007), Yellow 5 Lake (Ci 19140)]
Disclaimer: Ingredient lists are as available by the brand (or retailer) at the time of publishing. Please always check product packaging, if it exists, for the ingredient list applicable to the product you're purchasing, or the brand or retailer's website for the most up-to-date ingredient list.