Well, I'm kind of going out on a limb here, at the risk of being labeled.
My husband and I spent quite a significant amount on my engagement ring, along with the wedding bands. Yes, bands. I have a 1.22 carat brilliant cut center stone, D color, VS2 clarity, with 4 smaller diamonds on either side. I wear a band on either side of the engagement ring, and they each have 9 smaller diamonds, the same size as the side diamonds on the engagement ring. The set is platinum. The whole deal was about 16.5k.
We made the purchase together, although he did pay for all but about 3k of it. We spent about 6 months shopping for rings/wedding sets so we were able to get a good idea of what was out there and what we liked. We already owned a home at the time, and we weren't planning on having the wedding for about a year and a half. (We've been married about two years now.) I don't have any other jewelry to speak of. Most of our 'significant' purchases now are towards upgrading his Jeep and his gun collection. Trust me, that adds up over time!