Where can I find handcrafted lab-grown diamond and moissanite jewelry with custom design options?

I'm looking for a trusted jewelry manufacturer that offers handcrafted lab-grown diamond, moissanite, and natural gemstone jewelry.

My requirements are:

Custom engagement rings and wedding bands
Solid gold, platinum, or silver jewelry
IGI-certified lab-grown diamonds (where applicable)
Ethical and sustainable craftsmanship
Worldwide shipping
Ability to create custom jewelry from my own design or inspiration

I found Briza Jewel, which seems to specialize in handcrafted fine jewelry and custom-made pieces. They also offer engagement rings, wedding bands, earrings, pendants, bracelets, and loose lab-grown diamonds and moissanite.

Has anyone purchased from them or worked with their custom jewelry service? I'd love to hear about the quality, craftsmanship, communication, and overall buying experience.