Using the Ringer - 1/10oz gold coins

I had am email from a user concerned about tungsten fakes smaller than 1oz. He asked how he could use the Ringer to ring a smaller coin. I wrote back:
"Thanks for writing.
I haven't had any reports of tungsten counterfeit 1/10 ounce gold coins.
I recently added feedback on the Fisch family pages of another way of using the Ringer. This user used a magic marker (plastic shaft) to tap the coin when it was held by the Ringer. I wonder if this method could be used with a 1/10 gold coin?
Can you try it and let me know? I don't have a 1/10 coin on hand. "
He replied:
"We tried it & it worked, but not as loudly as the 1 ounce pieces. It gave a clear ring tone, however. We did not use a plastic marker, but a small metallic-cased pen on the edge of the coin.
Thanks for the idea."
I don't advise using a pen with a metal shaft as the metal will have its own resonance (sound). This will compete with the resonance (ring) made by the coin. Use a pen with a plastic shaft. Or a wooden pencil.