Grain (measure) Guide, Meaning , Facts, Information and Description
A grain is a unit of mass equal to 0.06479891 gram, in both the avoirdupois and troy weight systems. An avoirdupois pound is 7000 grains, whereas a troy pound is 5760 grains.A metric or pearl grain is equal to 50 milligrams or 1/4 of a carat as used in pearl and diamond nomenclature.
Originally, a grain was the weight of a grain seed from the middle of an ear of wheat.
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