Starting prices in 18k yellow gold. Platinum adds roughly 20%, and stones are quoted separately and openly.
Because it is the honest way to do it. You see the setting cost and the stone cost separately, and you can put a smaller stone in a better setting or the reverse. Bundling them is how margins get hidden.
Named suppliers with origin documentation, which we show you at the appointment. If a stone cannot be traced we do not buy it, which is why our selection is smaller than a mall jeweller's.
Yes, on anything we made, for as long as you own it. Rings with stones all the way round can only move a size or so either way, and we will tell you that before you buy rather than after.