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150 grooves
a quarter has 130 grooves.
According to the U.S. Mint, a dime has 118 reeds (grooves).
A glass child's marble is made by dropping a small slug of semi liquid glass into the space between the pair of rounded grooves, that spiral away along a pair of rollers. Emerging as a round marble, and now cooler.
A quarter has 119 grooves on its edge, a dime has one less groove