There's also Madly Gems which is quite popular. My fiance (then bf) and I went there together, but their range is quite limited (maybe our budget too low for them) and it's super ex!! Quoted us like $3-4K for tanzanites, and not even including the ring design yet.
With gemstones you also have to be very careful and do your research, because there's so many different types. And it's not like GIA diamonds where everything is very standardised. So you have to know what you want, and not get smoked by the sales pitch and the terms they use (e.g. heated vs unheated sapphires, what colours are the best, etc).
My own ring was from a private jeweller recommended by a friend. They actually helped me source the sapphire, and created the ring design from scratch! And much cheaper than most retail stores here too. Can PM me if you want the contact.
With gemstones you also have to be very careful and do your research, because there's so many different types. And it's not like GIA diamonds where everything is very standardised. So you have to know what you want, and not get smoked by the sales pitch and the terms they use (e.g. heated vs unheated sapphires, what colours are the best, etc).
My own ring was from a private jeweller recommended by a friend. They actually helped me source the sapphire, and created the ring design from scratch! And much cheaper than most retail stores here too. Can PM me if you want the contact.