I feel like there is a definite difference in the way diamonds are marketed (for engagement rings) than the other things people put out as examples.
Market a video game, car, etc, and most of the time it makes you WANT one. That's the idea. There are exceptions, but it all revolves around "want".
Diamonds for engagement rings are marketed as a "need". "It's not true love if it's a diamond, He doesn't care about you if it's not a diamond, It's not forever if it's not a diamond."
To me, that's really...uh, insulting I guess. When the subject of marriage was breached, and the idea of diamonds, it seems almost the very opposite for me. IE, they tell you diamonds are valuable, but they're really not. Not at all. They're valuable because of a marketing campaign to make you think that they are. And I'm sure no one believes that anymore, but still, it's now ingrained that diamonds are forever. You get a diamond as an engagement ring because it's valuable, and worth your true love etc, etc, yet it's the very opposite. When I wear jewelry, (at all), I am a fan of sapphires and silver/plat/white gold. So it was one of those, "If we're actually using the "actual" value of the item, don't get me a fucking diamond."
I don't know, YMMV but I just really don't care about diamonds. I found some really pretty sapphire engagement rings that will probably be surrounded by moissanites since they are cheaper. And it will be pretty, and I'll be happy.
As far as wedding costs, my sister just recently got married; 350+ people, full blown catholic wedding, crazy expensive country club attendees only reception hall etc. I was happy she was so happy but jesus christ. Between 3-4 trips back to the east coast for the bachelorette's party, the actual planning thereof, the bridal shower, the ceremony and reception etc,herwedding probably cost me something like 7-8K. HER WEDDING. It's partly because of the shit she wanted for the wedding, and what she wanted, and she's my sister so I told her, "sky's the limit babe" but FML.
The actual planning of my wedding is considerably easier and cheaper. It's either at city hall or a gazebo and done by a friend of ours willing to get ordained online, small wedding of like, 10 people, (needs to be this because after my sister got walked down the aisle I'll feel like a total douche if I don't do that for my dad too) and then a small reception/bbq etc where I can throw on some leggings and converse and get out of my dress.
I anticipate my joyous day to cost approximately 1/3 of what I spent on my sister's joyous day.