Machine pawnshops use to test metals
August 20, 2016 9:47 PM   Subscribe

What is the name of the machine that pawnshops use to test precious metals that are tendered for sale? For instance, they can tell which silver rounds are knockoffs and are just silver plated.
posted by ackptui to Work & Money (1 answer total)

« Older Best paperback edition of the complete works of...   |   How does a houseguest not bring fleas? Newer »
This thread is closed to new comments.