Coin Community Family of Web Sites Join Thousands of Coin, Bullion, & Money Collectors
Royal Canadian Mint products, Canadian, Polish, American, and world coins and banknotes. Vancouvers #1 Coin and Paper Money Dealer 300,000 items to help build your collection! Coin, Banknote and Medal Collectors's Online Mall Join Thousands of Coin, Bullion, & Money Collectors Specializing in Modern Numismatics Royal Estate Auctions - $1 Coin Auctions








Username:
Password:
Save Password
Forgot your Password?


This page may contain links that result in small commissions to keep this free site up and running.

Welcome Guest! Registering and/or logging in will remove the anchor (bottom) ads. It's Free!

Any Opinions About The Toning On These? *bigger Photos*

To participate in the forum you must log in or register.
Author Previous TopicReplies: 18 / Views: 2,251Next Topic
Page: of 2
Pillar of the Community
Australia
1295 Posts
 Posted 01/28/2007  10:40 pm  Show Profile   Bookmark this reply Add markn to your friends list Get a Link to this Reply
From a chemical point of view toning will depend on how the coins were stored and the crystalline structure of the coined metal. Generally we are conditioned to think that toning does start from the outside and this is due to the method in which the vast majority of coins are stored:

1. In albums
2. In rolls
3. In 2x2 holders (maybe less likely, I am not sure 2x2's have been around)

In each of these cases the interface between the coin and the chemically reactive holder is around the edges and thus toning is more than likely to start around the edges. Hence the term 'album toning' or 'roll toning'.

However, from a mettalurgical point of view toning can happen in areas of highest stress on the coined metal. In these areas the crystalline structure is finer and with more crystal/crystal interfaces it can result in areas of the coin thatc will tone more than others. Take some images we've seen on here of bag toned morgans, in this case the toning is across the surface the coin and doesn't seem to have started at the edges. This is because the surface of the coins was in contact with a chemically reactive coin bag.

The other factor to take note of here is that Australian pre-decimal proofs were often struck with business strike dies that were hand polished. In the case of the 1955/56 penny proofs this can lead to strange toning and luster breaks due to the die polishing marks in the fields.

To be perfectly honest, with coins as rare as these (and pre-decimal proofs this early are extremely rare) I wouldn't be bothered too much even if they were AT. It will be a long long long time before coins like them come back onto the market.
Pillar of the Community
Snooba's Avatar
Australia
1360 Posts
 Posted 01/29/2007  9:50 pm  Show Profile   Bookmark this reply Add Snooba to your friends list Get a Link to this Reply
Thanks, Susan, for uploading the photographs for me!
New Member
Prometheus68's Avatar
United States
20 Posts
 Posted 01/30/2007  7:38 pm  Show Profile   Bookmark this reply Add Prometheus68 to your friends list Get a Link to this Reply
Wow....fantastic....
  Previous TopicReplies: 18 / Views: 2,251Next Topic
Page: of 2

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



    




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 - 2026 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 © 2005 - 2026 Coin Community Forums
It took 0.23 seconds to rattle this change. Forums