Mazza, I doubt anyone could answer that for you. Most posters here aren't American so would know nothing of this site.

Now I've never bought a ring in Pinas but would say the following:

Rings are priced based on the cost of the metal, any jewels, the labour rate of the goldsmith and the mark-up of the goldsmith.

Metal (gold) and jewels (diamonds) pretty-much go at market rate. The difference, then, is labour rate and mark-up,

If I was around Manila, as you are, I'd be much more inclined to find a small, independent goldsmith who could make a ring or two to my design rather than buy from an online catalogue.