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Offline xsareloTopic starter
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« Reply #20 on: March 01, 2013, 11:51:21 pm »
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Ok guys, it is all good.

GD, are you, maybe, confusing Uruguay with Peru?? I don't think we produce bauxite over here.

Anyway, I posted my finds in this post, quite a lot of coins and a nice bullet:

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Offline GoldDigger1950
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« Reply #21 on: March 02, 2013, 07:16:14 am »
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Quote:Posted by xsarelo
GD, are you, maybe, confusing Uruguay with Peru?? I don't think we produce bauxite over here.

Central South America has abundant deposits of bauxite. Uruguay is on the very edge of the range.

The point is that identifying by guessing is impossible. You need to study up on some elementary geological testing that can be done using simple equipment. The easiest is to get a white ceramic tile from your local brickmason and use the back side of it for streak testing. Cost you just a small amount. Specific gravity testing can be done with a suspension scale and a glass of water. Can't get any simpler than that. Hardness testing can be done by gathering a few tools together and some known hardness minerals and rocks.

Also, you can grind a corner of your piece to see what the interior matrix looks like. If it is a chunk of meteorite, the matrix will pop out to you like a 3D movie spear.

Learn a bit about all of those by using Google. No kidding. The instructions are out there.

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It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
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« Reply #22 on: March 02, 2013, 01:06:54 pm »
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Cool so now will we know what is the object inside this piece of conglomerate or not? Gold or Silver? that is the question

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So many questions so little time
Offline nickel_n
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« Reply #23 on: March 02, 2013, 03:54:45 pm »
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Quote:Posted by xavier
what is the object inside this piece of conglomerate

No until he brake it open

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Offline xsareloTopic starter
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« Reply #24 on: March 02, 2013, 06:27:10 pm »
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It was VERY hard, but I broke it. A piece of wire mesh was inside. How is that possible, I don't know.

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Offline au fever
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« Reply #25 on: March 02, 2013, 06:35:16 pm »
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It has probably been submerged in water a long time , enough for concretion to build up around it . cheers Mick

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Offline BitburgAggie_7377
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« Reply #26 on: March 02, 2013, 07:03:27 pm »
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Quote:Posted by xsarelo
How is that possible, I don't know.


How that is possible is pretty much how Seldom was trying to tell you.   Seawater contains many, many dissolved minerals from a variety of sources, including broken seashells.  Some of these minerals, such as calcium carbonate, make very good binding agents.  So when the calcium carbonate molecules settle on the mesh, sand sticks to it.   The mesh with the sand stuck to it gets tumbled around and collects more sand and more calcium carbonate.   And over time, it becomes a big, hard rock which because it has the wire mesh inside is able to be "seen" by your detector.

BA


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Offline GoldDigger1950
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« Reply #27 on: March 02, 2013, 08:18:19 pm »
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Quote:Posted by xsarelo
It was VERY hard, but I broke it. A piece of wire mesh was inside. How is that possible, I don't know.

It was building stucco.

Now do you see why it is so very hard to identify a find by a photograph?

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It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
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Offline seldom
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« Reply #28 on: March 02, 2013, 08:19:25 pm »
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Quote:Posted by xavier
Gold or Silver?


Will not happen on gold, silver, lead, copper and some other metals all I can remember seeing it happen on is steel and  iron


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Offline GoldDigger1950
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« Reply #29 on: March 02, 2013, 08:21:44 pm »
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Not this time, Seldom. I believe it is a chunk of building debris. Some stucco siding.

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It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
Let's Talk Treasure!
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