| Author |
 Replies: 38 / Views: 5,237 |
|
Pillar of the Community
United Kingdom
1273 Posts |
Or platinum? Specific gravity is 8.61. Thanks for any help. Weight is 800 grams.     Edited by TobyJ
07/18/2021 09:23 am
|
|
|
|
Bedrock of the Community
United States
19184 Posts |
Perhaps a projectile fragment from times past.
|
|
Moderator
 United States
56855 Posts |
|
|
Pillar of the Community
 United Kingdom
1273 Posts |
When polished with a cloth, it leaves black residue on the cloth which is an indicator of being silver. It is not magnetic. Just done a hydrochloric and sulphuric acid test for platinum and it isn't platinum.
John, the specific gravity equals copper beryllium but I'm sure this isn't a copper alloy.
|
|
Pillar of the Community
Canada
5246 Posts |
The specific gravity is way too low for silver.
|
|
Pillar of the Community
United Kingdom
1273 Posts |
I'm seeing that German silver has a specific gravity of 8.58. Could this be a silver alloy of some sort?
|
|
Pillar of the Community
Canada
5246 Posts |
"German silver" does not have any silver in it.
It is a simple matter for any coin dealer or jeweller to do a test to see if it has any significant % of silver in it.
|
|
Moderator
United States
34424 Posts |
Such a weird find. I would definitely take it to a jeweler or LCS and have them tell you if it has any silver in it. I do note that metals other than silver could leave behind dark residue on a cloth. Please follow up on this thread when you do find out what you've got. Thx!
"If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz
|
|
Bedrock of the Community
United States
10284 Posts |
Edited by TNG
07/18/2021 12:56 pm
|
|
Pillar of the Community
United States
1312 Posts |
|
|
Bedrock of the Community
United States
19184 Posts |
Could be a fragment of a larger meteorite, or a chunk of a large aerial bomb casing or very large artillery shell. Would be interesting to learn the results of a materials analysis.
|
|
Pillar of the Community
United States
4692 Posts |
It very well may be a beryllium alloy. Beryllium is toxic, so I wouldn't handle it until you know what it is. Beryllium is used in nuclear reactors so if it was used as such, it may also be radioactive. https://periodictable.com/Elements/004/index.htmlBTW, there are a number of super-alloys currently being used and experimented with in the aerospace industry which you will not be able to find info about in the open literature due to the secretive nature of their properties. It could be one of those that was either discarded or re-entered the atmosphere. If I had it, I would first see if it was radioactive so as not to put myself in danger. If it's not, then only an XRF will give you a breakdown of what is in it, everything else is just a guess. Edited by jimbucks
07/18/2021 3:00 pm
|
|
Bedrock of the Community
United States
94367 Posts |
Specific gravity is way too low for lead.
|
|
Bedrock of the Community
United States
19184 Posts |
So, where was it found? Far inland? Coast?
|
|
Pillar of the Community
United Kingdom
1273 Posts |
Thanks for all the replies. Very interesting, going to take it to a jewellers and hope they will shed some light on it. It was found embedded on the bank of an estuary when I was out walking. I will certainly update when I find anything out.
|
|
Pillar of the Community
United States
1498 Posts |
Hope it IS an interesting alloy or element. Hope it is NOT radioactive.
May be worth noting the specific gravity of nickel is 8.9. SG for pure silver is higher at about ten and a half.
Edited by halfamind
07/18/2021 4:43 pm
|
| |
Replies: 38 / Views: 5,237 |
Posted 07/18/2021 10:35 am
