|COIN COLLECTING DEFINITIONS STARTING WITH "I"|
impaired Proof: a Proof coin that has been spent, cleaned, or otherwise damaged.
incandescent light: a normal light bulb, usually 75 Watts, used to grade coins.
incomplete strike: a coin that has parts of the design missing or weak. This can be caused by poor pressure, mis-aligned dies, or foreign matter on the dies.
incuse: refers to designs or lettering that are impressed into a coin (instead of being raised). The best examples of this are the $2.5 and $5 Indian gold pieces issued from 1908-1929.
Indian Head cent: the U.S. One Cent coins struck from 1859-1909.
Indian Head Eagle: the U.S. $10 gold coins struck from 1907-1933.
Indian Penny: the U.S. One Cent coins struck from 1859-1909.
inscription: the wording or legends on a coin.
intrinsic value: the metal or bullion value of a coin, regardless of the face or collector value.
investor: a person who buys or collects coins with the intent to make a profit.
iridescence: refers to the brightness or reflectivity of toning on a coin.
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