Jewelry for the most part is marked up over 100% in retail. If you buy a diamond ring at retail for 10,000.00 you will never get 10k back if you pawn it and I highly doubt you'd get 10k or even close back if you did it private sale - even if it was branded "Tiffany".
Gold & platinum have varying values by weight. Unless it's a very weighty piece that wasn't marked up by much, I'd say it's a bad investment. Loose diamonds can hold & gain value, but of course that depends on what you have to pay for them.
I don't see luxury handbags as an investment, though I have resold some of my LVs it was never at what I purchased them for, close, but My opinion is investments are supposed to gain/retain value for the future, not lose value. There's always risk but a used Luxury handbag will almost* always be worth less than what you originally paid.
Gold & platinum have varying values by weight. Unless it's a very weighty piece that wasn't marked up by much, I'd say it's a bad investment. Loose diamonds can hold & gain value, but of course that depends on what you have to pay for them.
I don't see luxury handbags as an investment, though I have resold some of my LVs it was never at what I purchased them for, close, but My opinion is investments are supposed to gain/retain value for the future, not lose value. There's always risk but a used Luxury handbag will almost* always be worth less than what you originally paid.