
Based on the provided information, the standard weight of a silver dollar is a precisely defined specification established by the U.S. Mint. According to numismatic resources, a newly minted, uncirculated Morgan silver dollar has a standard weight of 26.73 grams. This specific mass is a direct result of its metallic composition, which consists of 90% silver and 10% copper.
The weight is a critical diagnostic for collectors and investors. The practice of weighing individual Morgan dollars is common among numismatists to help verify a coin's authenticity and assess its condition. While a mint-condition coin should be very close to the 26.73-gram standard, minor variations can exist due to minting tolerances.
Furthermore, coins that have been in circulation will typically weigh slightly less than the official standard. This loss of mass is due to wear, where the friction from handling and contact with other objects gradually erodes the metal from the coin's surface over time. Therefore, a Morgan dollar that is significantly underweight may indicate heavy circulation, excessive cleaning, or that it is a counterfeit.


