Water penetration?

Water penetration? Images

Water penetration?

Water penetration? Description

Recently installed a Creme Marfil vanity top. When water beads up and (http://maplered.com) I wipe it away there remains a dark spot for a little while. Is this normal? It doesn't seem like it stays permanently but is making me a little crazy. Any others?

Monument

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Perlino Bianco

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Natural Stone From China

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