I’ve seen it in various diamond cuts. Always thought it’s more of a personal preference rather than a gold standard. Even the settings (3 prong, 4 prong, etc) can vary quite a bit.
that is the same story re: eternity/ inline bracelets/ tennis bracelets.
I like the carre cut ones, but they are super hard to find as it is not a common cut. MRB are the more common stones for these bracelets.
Given the rarity of the cut to go into the bracelet i am after, it will be custom and most likely the MMD route.
i am quite sated for now, have had a few years of splurging leading up to my 50th!!! I need a break and rebuild funds LOLOLOL