Rockwell Test Mark 2022 Wilma Mankiller Quarter

Yes that helps tremendously. The way you explain it makes me feel like I'm almost there at the mint. Diamond tip would explain the round circles to me at least. Like a waffled coin that that should be recycled sometimes they end up in people's hands. All this is only conjecture as I wasn't there to see the coin tested. It works in my mind though. Allows me to imagine what could be. My mind is open not closed to possibilities. I always try to think outside the box. Iridium coins? What's that? Must be foreign or some other purpose. Don't think I remember hearing of those

When I worked in the aerospace industry as a QA Engineer we used a Rockwell Hardness tester. And what I was taught you never preformed the test right next to a previous test like shown in your picture were the two are almost touching. Because you could inaccurate test results. also those just do not look like any Rockwell test marks I have seen. But again we were testing way different metals than that what a quarter is made of. Just my 2.5 cents worth.

Thanks pnwmakes. Your QA was surely at higher tolerances than at the mint because it's life or death as apposed to someone finding some anomaly and not recognizing it. We've all seen the QA from the mint in the last few years and since it's inception. Apples and oranges. Your info does help though and I'm glad you chimed in. My pictures are only ok. I will definitely take your reply into account. That's all I was looking for is others opinions. I appreciate it. Looks like you can see facets in this picture. Maybe not

Silviosi provided some great info. Notice that Hardness testing IS NOT done on struck coins. It is done on the strip, or more precisely, a piece cut from the strip. There is no easy way to drag the testing unit to the warehouse and try to make the strip fit in (look at Silviosi's pics). Plus, the QA probably has sampling locations to get a representative look at the lot.

Every place I worked, hardness testing is considered a destructive test, so all samples are disposed of after testing. Anybody who has been in a QA knows that test samples are tightly controlled and taking a destructive test piece back to the production line will get you fired.

I wish error ref would remove the hardness testing section. Based on the test procedures, testing equipment, QA requirements, sample disposition protocols, and the fact that any test mark would be deformed or obliterated during striking, I find it impossible for one of these to show up on a finished coin.

Thanks Coop and Hobbs9. There's no pressure ridge. Which way is "the damage" coming from? Conversation and information is valuable also so we all learn and enjoy what we're doing. No one is right or wrong all the time. More pictures

Thanks Silviosi. The more info the better

And I'm no expert so I could be wrong. So can you

@RW: If go to see them ask if they can give a copy of theirs software OmniMet. This it is use in metal work at the Mint. You can have all the info automatic with this soft. Me for moment I use only to detect the design varieties, the metal grains in what improper is say Lam, annealing problems or cladding problems.