Hardness Tester

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what should the rockwell hardness of platinum be?

i think i have a platinum nugget and i need to know what the hardness should be and i have access to a rockwell hardness tester. So please if you know let me know what platinum should be.

I'm not sure about the hardness, but that's not a very good test for platinum anyway. Many things have the same hardness. Do an acid test on it. It's a Nobel metal. HCl will have no affect on it if it's really Platinum. Hydrochloric Acid is very cheap and is sold at any hardware or paint store. It should not bubble or fume or change color when in contact with pure Platinum.(or Gold). Although, even close to pure will react if it's left for a long period of time. If you drop it in HCl and see no immediate reaction, chances are you have what you think you have, provided the sample meets other criteria, such as color, weight, hardness, etc.

Platinum has it's own color, just like gold does. Other things are similar, but not the same. Brass looks somewhat like gold, but very different to the trained eye. And somewhat different, even to the layman. Platinum is "silvery" but not the same as silver.

Good luck!

Edit: I guess I should add this, just in case. I'd put the hardness between 8 and 9 on the Moe's scale.

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