Mother-of-pearl is the hard ... South Sea pearl-shells are common, with white edges. The beautiful dark green pearl-shells called ear-shells or sea-ears, are more concave than the others, and ...

By secreting layers of aragonite and conchiolin, the same substances that are in its calcium carbonate shell, the mollusc creates a material called nacre, commonly known as mother-of-pearl. The oyster ...

Pearl Jam kicked off their world tour in support of Dark Matter Saturday in Vancouver ... covers of Tom Petty's "I Won't Back Down," Mother Love Bone's "Chloe Dancer/Crown of Thorns," and Neil ...