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 Replies: 45 / Views: 4,903 |
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Pillar of the Community
United States
842 Posts |
I have never been someone who has excelled in math, so I would like someone to double-check me. I am trying to calculate the silver weight in foreign coins. For instance, a Dutch 2 Stuivers from 1785 weighs 1.62g and has a silver content of .583 so would I be correct in saying it has .94446g of silver? And that this would translate into .033315 ounces? Thanks!  |
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Pillar of the Community
United States
564 Posts |
Everything is correct up untill you translate that into ounces. Silver is measured in Troy ounces which has 31.103 grams. It would take approximately 33 of them to have 1 Troy ounces of silver. One coin would have .03037 Troy ounces of silver in it.
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Pillar of the Community
 United States
842 Posts |
Oh I see my mistake. I used regular ounces to grams, not Troy ounces to grams. Thank you so much for your response!
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Pillar of the Community
United States
3670 Posts |
Wait till you start converting penny weights to grams or vice versa.... Here are a few questions on my tests I have to take where I work.... 1.If I have a yellow 14K gold necklace that weighs 43 pennyweight, how much pure gold does that necklace contain? 2.How much pure silver does a 976.25 ounce .999 silver bar contain? 3. If you have a silver platter that is marked .800 an weighs 748 grams on the scale, how much pure silver does the silver platter contain.... 4.How much pure silver does a 1921 Morgan silver dollar contain? 5.If I have a gold bracelet that is marked as 22K and weighs 93.4 pennyweight, how much pure gold does that bracelete contain? 6.If I have a medallion that is marked "14K HGE", and weighs 15 grams how much pure gold does that medallion contain? 7. What purity pertains to the Gold American Eagle coin series? |
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Pillar of the Community
United States
4008 Posts |
Looks like a decent test, Hawk. As long as you know what a pennyweight is, you're golden.  Personally, I wish that we would just abandon all of the ancient weights and measures and just use the metric system. It's a lot easier to use and to keep track of this vs. that, rather than having such a mix of weights and measures in various industries. We don't use furlongs per fortnight as a measurement of velocity and there are good reasons for that!  |
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Pillar of the Community
United States
842 Posts |
What I was trying to do with all of this was calculate my total silver holdings (in coins). I went through my entire collection and calculated the Troy ounce weight of each to get a total. I was able to do this with every silver coin except for my ancients (can't calculate percent silver for those). I currently have: 31.6736 oz of silver!  I had no idea that I had so much. Wow! It is an awesome feeling watching that value go up as I went.  |
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Rest in Peace
United States
9104 Posts |
Quote:
1.If I have a yellow 14K gold necklace that weighs 43 pennyweight, how much pure gold does that necklace contain? 24.1875 dwt. If 14KP, 25.08 dwt. Quote:
2.How much pure silver does a 976.25 ounce .999 silver bar contain? 975.27 Quote:
3. If you have a silver platter that is marked .800 an weighs 748 grams on the scale, how much pure silver does the silver platter contain.... 598.4 grams or 19.24 troz Quote:4.How much pure silver does a 1921 Morgan silver dollar contain? None, Morgans are only .900 fine Quote:
5.If I have a gold bracelet that is marked as 22K and weighs 93.4 pennyweight, how much pure gold does that bracelete contain? Prolly none, but supposedly 85.62 dwt Quote:
6.If I have a medallion that is marked "14K HGE", and weighs 15 grams how much pure gold does that medallion contain? Not a whole halibut Quote:
7. What purity pertains to the Gold American Eagle coin series? 22K, same as the Krand. Do you know why? |
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Pillar of the Community
United States
3670 Posts |
I was thinking number three was a trick question, as what sterling silver is ever marked .800? I thought it all had to be .925. Now I know for example old Canada silver coins are often 80 percent..... Thanks Fredd, I was hoping you would chime in an help me out on these questions, as you are like a high speed human computer for that type of number crunching. I have the blank tests, an simply need to fill in the CORRECT answers for a study guide.... I have many more pages an I will post four or five questions ever so often to make sure me an my sidekick are not coming up with the wrong answers. Not like we get graded or fired or anything when we do take the tests, but if you get a test an the question is....What US coins are 90% from the years 1964 or earlier? And you can't even come up with quarters, halves an dimes, then your coin career may be a short one, lol.... Edited by Silverhawk74
03/31/2012 6:59 pm
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Pillar of the Community
United States
808 Posts |
Fun with PMs and dimensional analysis!
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Valued Member
United States
89 Posts |
Just a tip you can want to download a conversion app (to convert from grams to troy ounces). Very useful when buying silver or gold coins in coin shows.
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Pillar of the Community
United States
2335 Posts |
Quote:
I was thinking number three was a trick question, as what sterling silver is ever marked .800? I thought it all had to be .925. Now I know for example old Canada silver coins are often 80 percent..... Most silver pieces that are marked 800(or 835, 855, 950, etc) are made for the market outside the US. Gold in other countries is also seen in 6K, 8K, 9K & 22K in addition to the 10, 14 & 18K seen here. Gold can also be marked with a decimal....like .585 for 14K, or .333 for 8K. |
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Pillar of the Community
United States
4008 Posts |
Quote:
None, Morgans are only .900 fine True enough but if the question is "How much silver does a Morgan dollar contain?", then the answer is 0.7734 Troy oz. |
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Pillar of the Community
United States
3670 Posts |
I was thinking the same thing Ed as 1935 an earlier silver dollars contain .7734 as you said, where 1964 or earlier is .715....
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Pillar of the Community
United States
4008 Posts |
Wasn't there a time period when no US silver dollars were minted? Seems to me that there was. IIRC, the halves, quarters, and dimes were all equivalent in their silver / face ratio and had a bit less silver in them per dollar of face value than the Morgan and Peace silver dollars.
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Pillar of the Community
United States
4897 Posts |
No silver dollars have been minted since 1935 with the exception of the 40% Ikes between 1971 and 1976. The Ikes contain .3161 oz silver.
Edited by amida17
04/02/2012 7:02 pm
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Pillar of the Community
United States
3670 Posts |
Good call Amida I did not realize the Ikes 71-76 were 40%.... Your Kennedy halves from 1965-70 are also 40% silver.... |
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Replies: 45 / Views: 4,903 |
Posted 03/31/2012 12:50 pm
