He's probably referring to what is called "fine" jewelry: pieces that have been made of the best grade of metal, and/or has finer cuts and settings of natural or well cultured gemstones. Think 24k gold, De Beers diamonds, rare natural pearls, well cultured pearls like the Mikimoto Pearls... real emeralds from places like Africa and Colombia, Tiffany's 925 silver.
DP's need to say he bought her high end jewelry could be considered a telling statement... and I don't mean a "see, I gave her the good stuff, so obviously I was good to her" statement... what I am getting at: it may be a part of his MO: part of his getting, controlling and keeping tactic of having way younger women in his life, by lavishing them with expensive goodies.
Speculation is that he probably has a hidden girlfriend: well... if buying high-end jewelry is his way of wooing and getting his claws into young women, perhaps if LE follows his financial trail they may be able to pick up on expensive jewelry purchases that do not connect back to being for Stacey. Just a thought...
I think what he was trying to say was he bought & paid for her.He owned her / *advertiser censored* / tummy tucks / braces / high buck jewelry. Yep he gave her the world now he owns her.
I also am convinced he has a girlfriend. He probably has given her all of Stacy's high buck jewelry too.