Hello once again everyone, After recently getting my membership of this site I have been loving the ability to post all my questions. Anyway here is another question.
I have an interest in green gold, I absolutely love the yellow-green colour of it. I know the hardness of 18K Green with just gold and silver (750 Au, 250 Ag) has a hardness of 35 Brinell Hardness. Copper also has a Brinell hardness of 35. Usually this 18K green with just gold and silver is totes as being too soft however many people use pure copper and it’s hardness is the same as 18K green. Is this 18K green too soft? If so why is the use of copper (which has an equal hardness) more prolific?