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Buttons made from seashell were used in the Indus Valley Civilization for ornamental purposes by 2000 BCE.[ 6] Some buttons were carved into geometric shapes and had holes pierced into them so that they could be attached to clothing with thread.[ 6] Ian McNeil (1990) holds that: "The button, in fact, was originally used more as an ornament than as a fastening, the earliest known being found at Mohenjo-daro in the Indus Valley . It is made of a curved shell and about 5000 years old."[ 7]
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