This could be done with Diamonds also ...
The percieved value of a Diamond in our consciouness is very high. After all Diamonds are extremely rare and difficult to mine. Countless phrases we have burned into our brains just waiting to be activated.
But purchasing diamonds or seeing them out for sale ? There is so much opprotunity. People could be buying small diamonds as gifts if marketed correctly. There really is so much potential to capitalize on selling diamonds. I mean people are purchasing NFT's etc because of superior marketing and purchasing frameworks. People understand they may get burnt when they buy from a jewellery store with huge mark ups. But people would purchase small or larger raw diamonds if made more mass available. As well the idea of a diamond not being made from a lab will always hold more value.
Here's an example from the gold world of an idea ...
https://www.kitco.com/news/2023-06-19/South-Korea-is-selling-gold-bars-in-vending-machines-and-sales-are-surging.html