I think wealthy people don't feel the need to prove it, tend to be practical and not keeping up with Johnses. Their clothes and cars reflect the fact they don't feel the need to compete.
Generations of wealth can sometimes be indicated by inheritated jewellery, be it rings or brooches, beautiful silk scarves, and elegant handbags/umbrellas/accessories.
Recently I bought myself some lab grown fiamond jewellery, and I ve noticed people noticing my rings 😆😆😆...... They are not real diamonds but they look great as the style is understated and the stones are not obscenely big. I didn't buy them for the appearance of wealth, but its funny noticing people focusing on my hands. Some people are so impressed by (perceived) wealth. I wear a long winter walking coat most days, well cut and practical for the weather in my location. I think it is elegant and understated, perhaps the overall look makes the rings look authentic 😆😆.... I don't know and also don't care!
Anyone can"look" wealthy, posture, confidence, sensible and modest clothing, and nice jewellery.