Quote:
Originally Posted by WM6
This could be true, if we are talking about gold mixture, which we are not. Under condition, that your PD's are really capable to detect something on remote, whic are not.
Gold alloy (no matter which one) is not mixture of gold parts with other metals parts, it is ALLOY, whole new composite metal, with new chemical (different density, different melting point, different electrical resistivity etc.) and physical (different hardness, different elasticity etc.) properties.
Despite 14 karat gold is still named gold, but it is whole different metal as pure gold, by its chemical and physical properties.
Some gold alloys are by its chemical and physical properties in many cases more different from pure gold, than some metal from its neighborhood from period table: as Platinum (Pt) or Lead (Pb).
There is no pure gold in nature. All gold is some sort of very different alloy.
There is no on remote detectable "only" gold (by its chemical and physical properties) from gold alloys.
So your claim is pure bluff, with commercial intention to scam naive buyers..
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This seems to be an interesting discussion:
The question: Does alloyed gold or alloyed silver appear different to a detector?
The answer depends on what kind of detector is trying to find the alloyed gold or silver.
All gold is an alloy
We all know that gold is almost never found in a pure state, nor is natural silver. They always have other metals alloyed.
In California, Gold nuggets can be over 90% gold, with some silver and copper and a few other metals mixed into the alloy.
In other regions, the gold may be less than 50% pure for the gold that is mined. Of course, we know these alloys have different
electrical and magnetic properties than pure gold would have.
Then, we can look at the refined gold. We can buy gold bars that are 99.9999% pure. But they are still an alloy with 0.0001% other metals. So these "pure gold" bars do not have exactly the same properties as 100% pure gold. 100% pure gold does not exist except at the atomic level.
Can a detector find an alloy?
But for a treasure hunter, we are concerned if a detector can find a gold alloy or if it can find a silver alloy. We have this concern because we know there is no 100% pure silver or gold. All silver and gold objects we find will have some amount of other metal.
It is important to consider what kind of treasure detector you are using. If you are using a VLF or PI metal detector, then we know that the detector will be looking at the magnetic properties and resistance of the alloy. A good VLF metal detector can tell you when you found some metal that has similar magnetic and resistance properties as a gold alloy. But it is not guaranteed to be accurate, because the combinations of metals can cause a large range of magnetic and resistance properties for the alloy, depending on what metals are present and in what percentages. Most VLF detectors are preset at the factory to identify 14k or 18k gold, so if you have 10k gold, the detector may think you found a copper coin instead, or aluminum. PI detectors have very limited discrimination abilities, and we can expect them to perform not as well as a VLF at identifying what metal was found.
This is the reason why many metal detectorists dig everything they find.
They would not want to miss a gold ring that was reported as aluminum trash.
Can a long range locator find an alloy?
But this is not the metal detector forum, it is the long range locator forum. And we are not examining a VLF or PI detector, we are considering the Crypton PDGold detector, which does not use magnetism to detect buried gold. I am familiar with the principle that this locator works, and I have already described the principles that allow detection of long time buried gold. But for those who didn't find my posts, here is a short description of how the Krypton detectors find buried metals:
These detectors do not locate the metal, and they don't measure any magnetic properties of the metal alloy. The Krypton detectors measure very tiny electrical signals that occur just under the ground's surface, and above where the metal is buried. A buied metal object will corrode because of the action of microbes in the soil that secrete cyanide to dissolve gold, silver, copper and many other metals. these dissolved metal ions slowly move upward in the soil toward the surface, and they become a compound again before reaching the surface. The millions of gold ions give of millions of tiny electrical impulses as they re-combine as solid gold particles to create micro-gold particles a few inches beneath the surface of the ground.
The Crypton type locator senses these tiny electrical impulses. In order to determine the difference between the impulses that come from gold or from silver, the electronics can do that using spectral analysis electronics methods. The silver ions make a different spectral signature than gold ions as they combine to form a compound.
How do ions move from an alloy?
So, let us suppose there is a buried ring that is made of 50% gold, 30% silver, and 20% copper. This ring is 12k gold. After it has been under the ground long enough for microbes to dissolve trace amounts of the metals, we will see there are gold, silver and copper ions that are dissolved in cyanide complex and other organic acids, moving upward through the ground. When these ions move near the surface, they will recombine to become compounds. The gold will recombine with another gold ion and become a gold metal particle. The silver will combine with often a sulfide, or oxygen to become an oxide, and the copper can combine with many elements such as chloride, or sulfate, and others. At the moment each ion of each of these metals combine, they send out a small electrical signal. This is what is detected by this kind of detector.
If the detector is adjusted to register only the gold ions, then it will ignore the silver and copper ions. But you will find the gold alloys. The same is true if the detector is adjusted to register only the copper or silver ions.
Now, I am familiar with machines that work very well to accomplish this task. and even the best machines depend on the right conditions must exist. For example, there must be microbes in the ground that dissolve the gold, silver or whatever metal you are looking for.
Also, these ions must not be in a location that has heavy electric or magnetic activity in the soil. Any heavy electric or magnetic activity can cause the ions to all combine into compounds, so there are no remaining signals from ions.
The principle in these detectors often includes a very weak electric or magnetic stimulator to cause some of the ions in the path to increase their chemical-electrical activity while you are pointing the sensing coil at the area of the target.
Disclaimer
Finally, I have never used a Crypton locator. From what I know about their circuitry, they are very finely tuned to accomplish what I described above. But also remember the caveats I mentioned above. Since I have not used this locator, I cannot say it works. I have seen a number of similar machines which work very well, but when you take them to locations that have different soil chemistry, or different magnetic field properties, they sometimes will not work, unless you return them to the location where they were calibrated.
My point is that the properties of the alloys of gold and silver will make a big difference when you use a VLF or PI detector, but when you are using a long range locator that is sensing ions making chemical changes, then the alloy does not matter, as long as there are enough ions in the soil to measure.
Best Wishes,
J_P