BarryLS1
I dealt with both investment grade diamonds and engagement rings in my reply.
Diamonds are not a great investment because the pricing is controlled by a cartel led by DeBeers who has the ability to control quantity and quality of stones available on the market.
One of my favorite scenes in the movie Casablanca is of a wealthy refugee couple in Rick’s Cafe Americain attempting to sell a diamond to finance their trip to freedom. The buyer offers a very low price, the sellers seemed shocked and they are told that ‘diamonds are a drug on the market, everybody tries to sell diamonds’ in these times.