Would she be happy to wear a necklace that appeared identical to gold to the naked eye, but anyone with a $10 instrument could demonstrate was not gold but something relatively worthless? If so, I have something I would like to sell you that your wife would really love.
It's the look. You also get resin / rock / clay / steel / ... (anything really) jewellery. It's not just about the price. And even then, a jewelry-sized gold piece is quite cheap.
What’s better: someone living in a house, or a house sitting idle as a store of value?
What’s better: someone storing his wealth in houses and gold ignots, or in special financial assets that don’t take away products from other people?