large platinum ore found at gold mine?

[ChefCat]

Hey all, new prospector here. Caught the fever a month or so ago and have admittedly spent WAY too much time looking for gold and way too much money on equipment not justified by the amount I have found. Spent days of several weeks harvesting fools gold. Need to crush it as it still appears to have gold in it under the magnifier; is this common? Regardless, the hunt is a thrill and I have found some real gold. Figured you heavy metal geeks could help me ID this. Found at a gold placer mine known to have platinum. I have had these pitted shiny gunmetal grey metals tagged as platinum given the location of the finds. Just checked the density. The small one is 3.85 g/ml and the large one 3.78 g/ml. Platinum ore perhaps or another metal? What purity do you normally find raw platinum? Thanks!

 

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[oidium45]

Looks like a standard iron rock brotha..

 

[Jim in Idaho]

platinum is about 21.4 grams/ml

 

[galenrog]

In the end, if you believe it to contain platinum, a field test will me necessary. At the Gold Refining Forum, in the section on mining and prospecting, is a sticky containing field tests. If you choose not to go that route, an assay would then be necessary.

Personally, based on the images provided, I agree with Oidium45 that it is likely an iron rock. It could contain gold, but primarily iron.

Time for more coffee.

 

[et1955]

Test with a magnet to see if it is iron

 

[johnedoe]

spent WAY too much time looking for gold and way too much money on equipment not justified by the amount I have found.

LOL..... You and about 98% of all the rest of those who chase gold.

 

[XLV]

ferroplatinum is 12%-28% Fe what it looks like i don't know its density varies.......... maybe its 15 grams /ml on ....... what the density of those rocks 5 grams/ml do a test then you know what you found

 

[brianc053]

Hey, I have one of those rocks! And the density is about the same, around 3.75 g/ml.
But mine looks funny; there's some iron on the edges, of course, and I think the "gold-like" stuff on the front is pyrite, but what is the greenish stuff on top of that? It looks like it "flowed" onto the rest of the rock.
By the way, this rock makes the metal detector (Equinox 800 in Gold 1 mode) go nuts!

 

[Goldwasher]

Hematite

 

[spaghettigold]

To me it looks like (my)magnetite (O.P,s rock)