It is pretty hard to tarnish pure gold.
Bear in mind that gold used in jewelry is far from pure. Pure gold is 24-karat, American-made jewelry is usually 14K (which means 14/24 Au). European jewelry is 18/24 Au. That means that even European jewelry is at best normally only two-thirds gold.
I still advocate USPS “Forever” stamps as a good hedge. They will always be worth the mailing of one first-class letter. I recommended putting about 1/100,000 of your portfolio in “Forever” stamps.
Some people recommend 10-20% of your savings should be in gold. Another portion should be in guns and ammo.