Most people inherit a coin collection and have no idea what they're holding. Photograph both sides and find out in about four seconds.
Every US dime, quarter and half dollar made in 1964 or earlier is 90% silver. Count what you've got — this is just the metal, before any collector even looks at it.
Condition decides most of a coin's value, and a worn one and a sharp one look nearly identical to the untrained eye. This is one 1916-D Mercury dime across the grading scale.
A mint mark is a single letter about a millimetre tall. On the right coin it's the difference between melt value and every figure above. It's the first thing we read.
What each coin is, which years matter, and what they actually sell for.