Marc Jacobs Beauty O MG is a moderately warm-toned, medium-dark copper with a pearl finish. It is a permanent eyeshadow that retails for $29.00 and contains 0.13 oz.
Marc Jacobs Beauty O MG Omega Eyeshadow ($29.00 for 0.13 oz.) is a muted, medium-dark copper with warm undertones and a pearl finish. It had good pigmentation, which was buildable to full coverage with a second layer. The texture was smooth with slight slip, as it was dense and not at all powdery, but it wasn't stiff to work with and picked up well with a brush. The color applied fairly evenly, but I noticed it was best applied in a pressing motion than a sweeping one, otherwise the color did not adhere as well. On me, it lasted for nine hours before fading slightly.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.
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