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A Sprinkle of Blues #1 is a pale, cool-toned white that flashes blue. It's very, very sheer and powdery--it was almost chalky--and difficult to swatch, let alone apply. It clumps if you use it wet, so I wouldn't recommend applying it with a damp brush. Disney by Sephora Sick of Swimmin’ (LE) is very similar. Maybelline Waves of White (LE, $6.99) is greener. MAC Vellum is whiter with a less pronounced iridescence. See comparison swatches.
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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.