Log in or Sign up
Coin Talk
Home
Forums
>
Coin Forums
>
Coin Chat
>
Rust image of double eagle from SS Central America
>
Reply to Thread
Message:
<p>[QUOTE="calcol, post: 26240898, member: 77639"]The SS Central America sank off the coast of South Carolina in 1857. It carried a huge amount of California gold, much of it in the form of double eagles struck in San Francisco. Because there were hundreds of tons of iron in and on the ship, a layer of rust of a type know as goethite was deposited on nearly all the gold over many decades. And was present when the coins were salvaged.</p><p><br /></p><p>Bob Evans, chief restorer of the Central America gold, developed a technique for removing the rust without damaging the gold underneath. It was a very gentle, successful technique. Many of the coins were graded MS.</p><p><br /></p><p>Sometimes the goethite would come off in large flakes, and the flakes would be a mirror image of the coin underneath. Bob preserved some of the largest flakes. One of the most spectacular is pictured below (photo by David Heinrich). It’s a cast of an 1857-S double eagle.</p><p>To read more, see <a href="https://www.coinbooks.org/v28/esylum_v28n24.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.coinbooks.org/v28/esylum_v28n24.html" rel="nofollow">https://www.coinbooks.org/v28/esylum_v28n24.html</a> .</p><p><br /></p><p>Cal</p><p>[ATTACH=full]1676143[/ATTACH][/QUOTE]</p><p><br /></p>
[QUOTE="calcol, post: 26240898, member: 77639"]The SS Central America sank off the coast of South Carolina in 1857. It carried a huge amount of California gold, much of it in the form of double eagles struck in San Francisco. Because there were hundreds of tons of iron in and on the ship, a layer of rust of a type know as goethite was deposited on nearly all the gold over many decades. And was present when the coins were salvaged. Bob Evans, chief restorer of the Central America gold, developed a technique for removing the rust without damaging the gold underneath. It was a very gentle, successful technique. Many of the coins were graded MS. Sometimes the goethite would come off in large flakes, and the flakes would be a mirror image of the coin underneath. Bob preserved some of the largest flakes. One of the most spectacular is pictured below (photo by David Heinrich). It’s a cast of an 1857-S double eagle. To read more, see [URL]https://www.coinbooks.org/v28/esylum_v28n24.html[/URL] . Cal [ATTACH=full]1676143[/ATTACH][/QUOTE]
Your name or email address:
Do you already have an account?
No, create an account now.
Yes, my password is:
Forgot your password?
Stay logged in
Coin Talk
Home
Forums
>
Coin Forums
>
Coin Chat
>
Rust image of double eagle from SS Central America
>
Home
Home
Quick Links
Search Forums
Recent Activity
Recent Posts
Forums
Forums
Quick Links
Search Forums
Recent Posts
Competitions
Competitions
Quick Links
Competition Index
Rules, Terms & Conditions
Gallery
Gallery
Quick Links
Search Media
New Media
Showcase
Showcase
Quick Links
Search Items
Most Active Members
New Items
Directory
Directory
Quick Links
Directory Home
New Listings
Members
Members
Quick Links
Notable Members
Current Visitors
Recent Activity
New Profile Posts
Sponsors
Menu
Search
Search titles only
Posted by Member:
Separate names with a comma.
Newer Than:
Search this thread only
Search this forum only
Display results as threads
Useful Searches
Recent Posts
More...