The jeweler told me that one reason to get a natural diamond was that the prices of lab grown diamonds had been falling, whereas natural hasn’t as much, so the ring would hold more value. I told her that was exactly why we wanted to go with a lab grown diamond! This isn’t an investment — we aren’t planning to sell the ring.
Ultimately, for a price that didn’t break the bank, we got an absolutely gorgeous ring with diamonds larger and higher quality than we would have been able to afford with natural. Diamond rings may have started as something to resell in divorce, but for us (for my fiancé really), it was more about getting something that was beautiful, and if it didn’t cost as much, great! I suspect most Americans will feel similarly.