In its compounds calcium has valence 2. It occurs in limestone, chalk, marble, dolomite, eggshells, pearls, coral, and many marine shells as calcium carbonate, or calcite;

钙以方解石（碳酸钙）的形式存在于石灰岩、白垩、大理石、白云石、蛋壳、珍珠、珊瑚、钟乳石、石笋和许多海洋动物的壳体中。

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You can chalk the last 2 items up to it being newly opened, (although the paint issue truly bothered me), the first one is egregious.

FORBES: Mr. C Hotel and Restaurant Opens in Beverly Hills