A Glimmer of Gold #4 is a medium-dark, taupe with subtle warm, brown undertones and a pearly sheen. It was the least frosted shade in the quad. It had semi-sheer pigmentation applied dry, and then mostly opaque coverage when applied with a damp brush. MAC Silver Dawn (LE, $19.50) is lighter. Anastasia Antique (LE) is grayer. Urban Decay Nameless (LE, $18.00) is a bit darker. Edward Bess Dusk (P, $30.00) is browner. Urban Decay MIA (LE, $18.00) is darker. MAC Twilight Falls (LE, $21.00) is cooler-toned, less brown. MAC Satin Taupe (P, $15.00) is darker, cooler-toned. See comparison swatches.
The Mineralize Eyeshadow formula is supposed to have "low-to-medium coverage" when applied dry and "more intense coverage and color" when used wet. Most shades have color payoff that is true to the brand's description: semi-sheer to semi-opaque when used dry and semi-opaque to opaque when used with a dampened brush. I tend to find that they apply more smoothly and evenly with a more metallic finish with a dampened brush as well. Some shades can be a little too dry or dusty and do not apply as well with a dry brush. The wear is typically a bit less than average on me--six to seven hours.