So I've been hunting for a diamond cross pendant here in the US and honestly the pricing makes no sense until you know what you're actually looking at. Two pieces that look identical in photos can be worlds apart in person. What separates the ones worth buying from the rest?
Diamond quality and setting precision are the two things that separate decent pieces from forgettable ones. The way stones sit in the setting tells you more about craftsmanship than any certificate.
The setting precision point is spot on. A diamond cross pendant done properly has a consistency to it that's immediately obvious in person, stones that sit flush, metalwork that's clean at every angle, weight that feels substantial rather than hollow. Design matters too, the proportions between the cross dimensions and the stone placement either work together or they don't, and that's something worth looking at carefully before committing. One worth having a proper look at is https://pierrejewellery.com/katalog/11-diamond-cross-pendant