What is the value of a 1923 dime and is that dime mercury or silver?
Uh, remember high school chemistry? Mercury is a LIQUID at room temperature so it would be really, really, REALLY tough to make a coin out of it!
This design is nicknamed a "Mercury" dime because the portrait of Miss Liberty with a winged liberty cap looks a lot like the Roman god Mercury, NOT because it's made of the metal mercury.
Anyway, look at the back of your dime by the E in the word ONE. If there is a tiny S there your dime was made in San Francisco and is worth anywhere from $2 if very worn, up to about $15 with only moderate wear. If there's no letter it was struck in Philadelphia and is worth from $2 to $4.