A miner would be more likely to use panning to find platinum than to find topaz. This is because platinum is heavier than topaz.
If your question is regarding "panning" for gold, then the answer is NO! Gold is Not magnetic, so using a magnetized pan would retain other metals that are magnetic. This would defeat the whole panning method, because you want all of the non-gold debris to be agitated and rinsed away.
Since gold panning in the United States is no different from gold panning everywhere else, the simplest option would be to learn gold panning from one the many places which offer gold panning as an activity. Places that offer gold panning as an activity in the United States include: Columbia State Historic Park, Bannack State Park and Red Rock Canyon State Park. In general many national parks or similar places within the United States will be likely to offer gold panning as an activity. This is especially if they are located close to locations that are famous for gold rushes. Alternatively one can try to visit popular video webpages such as Youtube, since they will often have tutorials on gold panning made by amateur enthusiasts.
entering through the internet
platinum
Iron rusts readily; a process that would likely be accelerated by the salt and moisture of sweat. It is a rather poor material for jewelry. Platinum, by contrast is highly non-reactive and does not easily corrode.
The density of platinum is 21.4 g/cubic centimeter; the density of silver is 10.5 g/cubic centimeter. So...a quick way would be to determine the volume of the item (Archimedes' water displacement method still works) then weigh it on an analytical balance.
Tactical missiles or specialized artillery rounds, depending on the nationality of the adversary would seem most likely.
Panning was a method for separating gold from gold-bearing soil. It involved the use of a solid pan. An amount of potentially gold-bearing dirt was placed in the pan with some water, and gently swished and shaken around, a process which would bring the smaller particles of gold to the surface.
If you got your own spiritomb in platinum, Cynthia would still have her spiritomb.
Chronological.
I think that shaymin's forms are exclusive to platinum as they require a giveaway from a Nintendo event. If it wasnt built into platinum pearl/diamond then you wont be able to change its form. It would be like trying to trade across Pokemon to lower generation games which don't support that Pokemon. If the method for doing it in platinum doesnt work then you simply cant do it.
I would get Platinum