US Penny In Mohs Hardness Test Kit - Coin Community Forum

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Author	Replies: 10 / Views: 1,497
MachinMachinMan Pillar of the Community Australia 1985 Posts	Posted 08/03/2023 02:41 am I was amused to find a US penny included in my Mohs hardness test kit: The coin was a 2018 D which I believe is nothing special and therefore can be consigned to its new purpose of scratching and being scratched. Report this Post to the Staff

Errers and Varietys Bedrock of the Community United States 73688 Posts	Posted 08/03/2023 02:51 am Only thing to check on that year is the 2018 D WDDO-001. http://doubleddie.com/2477637.html Errers and Varietys. Report this Post to the Staff
Joshu - a Pillar of the Community United States 584 Posts	Posted 08/03/2023 02:58 am But of course they wouldn't include the #10 Report this Post to the Staff
jbuck Moderator United States 187702 Posts	Posted 08/03/2023 11:32 am Fascinating! Coin Collector Since 1978 Avatar Old Avatar 7070 Eisenhower Australia Canada World CCF Members on eBay CCF eBay Search Engine Report this Post to the Staff
Spence Moderator United States 34395 Posts	Posted 08/03/2023 12:33 pm That is pretty funny. I'd probably swap out for an all copper cent (for the US, pre-1982) though since as soon as you scratch this one, the exposed zinc core will start to degrade. "If you climb a good tree, you get a push." -----Ghanaian proverb "The danger we all now face is distinguishing between what is authentic and what is performed." -----King Adz Report this Post to the Staff
Dearborn Moderator United States 94786 Posts	Posted 08/03/2023 7:21 pm Quote: though since as soon as you scratch this one, the exposed zinc core will start to degrade Maybe that is the point Is that a soap stone in slot 10? and glass in 11. I suppose you are supposed to use each numbered rock to see which would scratch the stone and glass. Collecting since 1972. Learning from then on "Tell me and I forget. Teach me and I remember. Involve me and I learn." - Benjamin Franklin 7070 type set coin count: 51/76 Uncirculated American Silver Eagles My American Silver Eagle Proof Collection Sacagawea Dollars Innovation Dollars Eisenhower-Dollars Kennedy-Half Dollars Washington-Quarters Roosevelt-Dimes Buffalo-Nickels 1938-2005 Jefferson-Nickels Lincoln-Cents Report this Post to the Staff
HondoB Bedrock of the Community United States 24939 Posts	Posted 08/03/2023 7:31 pm Depending on the type, glass ranks around 5.5 to 7 Mohs. And whoever ranked fingernails that low has never encountered my big toe nail. Inordinately fascinated by bits of metal with strange markings and figures Report this Post to the Staff
Brandmeister Pillar of the Community United States 6458 Posts	Posted 08/03/2023 8:31 pm <<Wolverine has entered the chat>> Report this Post to the Staff
BStrauss3 Pillar of the Community United States 4588 Posts	Posted 08/03/2023 9:12 pm The problem is the coin is zinc with copper plating, the hardness is going to be more like zinc. -----Burton 50+ year / Life / Emeritus ANA member (joined 12/1/1973) Life member: Numismatics International, CONECA Member: TNA, FtWCC, NETCC, EveryCountry (online) coin club Owned by three cats and a wife of 40+ years (joined 1983) Author: 3rd Edition of the Sample Slabs book, https://www.sampleslabs.info/ Report this Post to the Staff
Dearborn Moderator United States 94786 Posts	Posted 08/03/2023 10:08 pm Quote: And whoever ranked fingernails that low has never encountered my big toe nail. or my dogs front clawz! Collecting since 1972. Learning from then on "Tell me and I forget. Teach me and I remember. Involve me and I learn." - Benjamin Franklin 7070 type set coin count: 51/76 Uncirculated American Silver Eagles My American Silver Eagle Proof Collection Sacagawea Dollars Innovation Dollars Eisenhower-Dollars Kennedy-Half Dollars Washington-Quarters Roosevelt-Dimes Buffalo-Nickels 1938-2005 Jefferson-Nickels Lincoln-Cents Report this Post to the Staff
jbuck Moderator United States 187702 Posts	Posted 08/04/2023 11:53 am Quote: <<Wolverine has entered the chat>> Coin Collector Since 1978 Avatar Old Avatar 7070 Eisenhower Australia Canada World CCF Members on eBay CCF eBay Search Engine Report this Post to the Staff
	Replies: 10 / Views: 1,497

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