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 Replies: 12 / Views: 965 |
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New Member
Malaysia
13 Posts |
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Moderator
 Australia
15419 Posts |
I suspect the answer is "no", it's not a nickel planchet. Nickel is very bright and reflective when struck as a coin, which this coin seems to lack. A foreign planchet needs to have some explanation as to how it got mixed up with the local planchets. To my knowledge, Malaysia does not get India to produce any of its coins, nor does India have Indians coins made at the Malaysian mint. If the Malaysian mint was not making any nickel coins, for Malaysia or for anybody else, then a nickel planchet seems very improbable.
The coin has a lower weight than standard; the question is, what else might cause a coin to lose weight? Circulation will, and this coin does appear to have seen some circulation, given the amount of scratches and dents in it. But another cause of weight reduction in coins is acid damage. Acid will also "brighten up" the coin, making it appear paler in colour; acid will also make the coin thinner than normal. It is possible, given the coin's condition, that it was lost outdoors and became corroded; someone then decided to clean off the corrosion with an acid soak.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis
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Bedrock of the Community
United Kingdom
12293 Posts |
An easy way to check is with a magnet. If a coin is made of pure nickel, it should be quite strongly attracted to a magnet. 75% copper 25% nickel coins are not noticeably magnetic.
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New Member
Topic StarterMalaysia
13 Posts |
Well, from the search that I gathered, I understand the first initial batches of coin that were produced from 1967 -1968 were from Royal Mint, London which does produced variety coins from all the world.Only starting from 1970, Malaysia have their own factory located in Shah Alam, Selangor start to produce these for the local market here as well as have the option of Royal Mint London also producing these coins. |
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Bedrock of the Community
Australia
21185 Posts |
The British Royal Mint produces coins for many countries around the World. Although not common planchets have been accidently mixed up with those intended for another country. That may be the case here with the coin in question. |
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Pillar of the Community
Canada
4782 Posts |
I'm surprised that nobody mentioned this. A nickel planchet would be highly magnetic, the copper-nickel no. Just put a magnet to it, and at least that will tell you something for sure.
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Pillar of the Community
 United States
5985 Posts |
Quote:
The coin has a lower weight than standard; the question is, what else might cause a coin to lose weight? Circulation will, and this coin does appear to have seen some circulation, given the amount of scratches and dents in it. But another cause of weight reduction in coins is acid damage. Acid will also "brighten up" the coin, making it appear paler in colour; acid will also make the coin thinner than normal. It is possible, given the coin's condition, that it was lost outdoors and became corroded; someone then decided to clean off the corrosion with an acid soak. I agree with @sap that some kind of surface corrosion/damage is the most likely explanation. The negligible difference in specific gravity between pure nickel (8.91) and cupronickel coin alloy (8.94) means wight is not helpful in solving the question (also taking into account the tolerances of the coin production process). On the other hand, selective leaching of one component at the surface via some eletrochemical process (i.e. corrosion, acid treatment, etc) would likely change the reflectivity and appearance. Ultimately, it can only be solved for certain by something like XRF, though as pointed out by others, the pure nickel hypothesis can be checked. (to me the surface looks like the kind of oxide layer developed by aluminum, zinc or tin, but in each of these cases the weight would be more significantly lower).
Edited by tdziemia
04/11/2023 10:41 am
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New Member
Topic StarterMalaysia
13 Posts |
Following on what has been suggested by some (all comment/replies are very highly appreciated)of the comments, I tried to use the magnet but it doesn't stick to it. It does prove a point that it's not 100% nickel,but then the big question still lingering,if it's not then what metal is it? It's whitish metallic and lighter...then it must be Aluminum coin because for that year 1967, India, Italy, Poland, Egypt,France & republic of Congo produced coin of aluminum composition.
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Pillar of the Community
Canada
9235 Posts |
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it must be Aluminum Aluminum is only about 1/3 as dense as CuNi. If the coin were aluminum it would weigh less tan a gram. XRF is about the only way to resolve your dilemna.
"Dipping" is not considered cleaning...
-from PCGS website
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Pillar of the Community
United States
5985 Posts |
Or it would be three times as thick.
Since the original post said the coin is thinner (but we do not know by how much), then it is impossible for it to be any of the metals I mentioned.
And remember the coin is only 9% underweight compared to the specification of 2.82 g. As pointed out by @sap, a combination of wear and some kind of environmental damage (and/or a coin that started out at say, 2.7 g) could get to that weight.
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New Member
Topic StarterMalaysia
13 Posts |
Well, I did some search that might be the lastest trend that's happening right now so that all the other options that I have prior to have it being analyzed with XRF gadget which is very² expensive, which is finding answer with ChatGPT Ai...I think u guys might get a surprise answer from this latest craze... ChatGPT made a confirmation that pure Nickel doesn't stick to a magnet, and Royal Mint of London do minted Indian pure Nickel coins....which summarize to answer that, could be that during the process of minting ,the staff at that time in Royal Mint accidentally used the indian planchet unto the Malaysian coin? |
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Pillar of the Community
Canada
4689 Posts |
Pure nickel does absolutely stick to a magnet .
Robots and AI still have a very long way to go .
Your AI source needs a new job description
Nickel is one of only four metals that are ferromagnetic, meaning they are attracted to magnets and are magnetic themselves.
Iron , cobalt , and nickel are the big three.
Edited by Pacificoin
04/12/2023 10:31 pm
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New Member
Topic StarterMalaysia
13 Posts |
I guess that's not a good way of getting answer from from an Ai.. well, I m done with the Ai thing...But fortunately I gathered another discovery of info...That supposedly nickel coin minted for India for that year is not 100% nickel...they don't stick to magnet.
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Replies: 12 / Views: 965 |
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Posted 04/11/2023 03:37 am
