May I know which country sell the most reasonable price for diamond ring (in term of carat) or white gold ring?

For example, Where (which country) can find the cheapest rate to purchase diamond ring or white gold ring from Tiffany & Co , Love & Co, Degem, Poh Kong, Tomei or other brands ?

Hope to get some expert advises from you all.

thanks.

From Noob.

Any branded and reliable wedding ring which can get cheaper from other countries?

Thanks for highlighting Tiffany & Co is the international brand only which i mentioned earlier, siowgirl.