Pre33 Gold XRF Test Results With Ag ?

To participate in the forum you must log in or register.

Author	Replies: 8 / Views: 348
lib9995 New Member Australia 40 Posts	Posted 02/21/2025 11:13 pm Hi guys! I have a question about some xrf results , regarding the metal composition? I tested 3 coins , a 1888 $1 lib, 1913 $2.50 Indian and a 1904 $20 Liberty. I know it's supposed to be 90% Au 10% Cu , but all 3 came back with 0.3% silver? I also tested another $5 1909-d indian and that has 0.2% Silver? They all weigh correctly and correct dimensions I'm wondering if this is normal and has anyone else that xrf checks their coins had similar results? I've added the pics , If anybody would know it's you guys! Much appreciated & Report this Post to the Staff

lib9995 New Member Australia 40 Posts	Posted 02/21/2025 11:15 pm Report this Post to the Staff
MisterT Pillar of the Community United States 1608 Posts	Posted 02/22/2025 05:20 am Sorry I can't help you mate, I don't have any experience with the XRF but those are some beautiful gold coins. Congrats! Report this Post to the Staff
nss-52 Moderator United States 54140 Posts	Posted 02/22/2025 06:46 am It is normal. Show your financial support of the Coin Community Family (click here) See my topic on Mexican Numismatic Medals (click here) Report this Post to the Staff
DOCC Pillar of the Community United States 1150 Posts	Posted 02/22/2025 08:00 am Trace elements - absolutely normal. I swing a metal detector and have a knack for finding dirty old coins. Dirt coin restoration projects - https://www.prodetecting.com/restorations Dirt coin restoration blog - https://www.prodetecting.com/blog/ccaw Report this Post to the Staff
BStrauss3 Pillar of the Community United States 4325 Posts	Posted 02/22/2025 12:11 pm You are wrong about the composition. https://maint.loc.gov/law/help/stat...2s3ch131.pdf Quote: SEC. 13. That the standard for both gold and silver coins of the United States shall be such that of one thousand parts by weight nine hundred shall be of pure metal and one hundred of alloy; and the alloy of the silver coins shall be of copper, and the alloy of the gold coins shall be of copper, or of copper and silver; but the silver shall in no case exceed one-tenth of the whole alloy. This allows 0%-10% silver, which implies 10%-0% copper as the other 90% must be gold. -----Burton 50 year / Life / Emeritus ANA member (joined 12/1/1973) Life member: Numismatics International, CONECA Member: TNA, FtWCC, NETCC, OnLine Coin Club Owned by four cats and a wife of 40 years (joined 1983) Report this Post to the Staff
NumismaticsFTW Pillar of the Community United States 2169 Posts	Posted 02/22/2025 1:58 pm .3 is so negligible, nothing to worry about. You realize when you know how to think, it empowers you far beyond those who know only what to think. -Neil deGrasse Tyson Report this Post to the Staff
thq Pillar of the Community United States 3188 Posts	Posted 02/22/2025 4:21 pm UK sovereigns and French 20Fs also use copper as the secondary metal with the gold. English guineas used an equal mixture of silver and copper for the alloy, according to this 1776 report: The English Standard for gold is 22. carats of fine gold + 2. carats alloy. I.e. 1/12 alloy of silver and copper in equal parts. https://founders.archives.gov/docum...1-01-02-0214 "Two minutes ago I would have sold my chances for a tired dime." Fred Astaire Report this Post to the Staff
BStrauss3 Pillar of the Community United States 4325 Posts	Posted 02/22/2025 7:38 pm In fact, you can sometimes estimate where the silver was mined by the trace elements... https://www.pnas.org/doi/10.1073/pnas.1018210108 https://www.sciencedirect.com/scien...409X16305107 -----Burton 50 year / Life / Emeritus ANA member (joined 12/1/1973) Life member: Numismatics International, CONECA Member: TNA, FtWCC, NETCC, OnLine Coin Club Owned by four cats and a wife of 40 years (joined 1983) Report this Post to the Staff
	Replies: 8 / Views: 348

To participate in the forum you must log in or register.

All Forums Category: US Coins and Currency Forums Forum: US Classic and Colonial Coins

Royal Estate Auctions - $1 Coin Auctions

The First Dollar, your premier source for bullion and rare coins. See our bullion list on the site and the coin inventory on ebay.

Silver Gold Bull US is the United States leading bullion dealer. We deliver gold coins, gold bars, silver coins, silver bars and precious metals to your door. Order today!

View Last 100 Active Topics

Disclaimer: While a tremendous amount of effort goes into ensuring the accuracy of the information contained in this site, Coin Community assumes no liability for errors. Copyright 2005 - 2025 Coin Community Family- all rights reserved worldwide. Use of any images or content on this website without prior written permission of Coin Community or the original lender is strictly prohibited.
Contact Us | Advertise Here | Privacy Policy / Terms of Use

Coin Community Forum

It took 0.42 seconds to rattle this change.