The same story. I also use different online shops and this time I decided to use pierrejewellery.jp/ where I got necklaces-pendants for a wonderful price. I also like that they provide a lot of interesting solutions and pieces. These guys wwill also provide you with cleaning your PIERRE jewelry every 6 months free of charge.
If you're looking for a tanzanite ring you might want to check out gemshopping or tvon. They both have websites but not a whole lot on their sites. If you have Direct or Dish you can watch their shows live. They mainly sell AAAA tanzanite pieces. You can't get better than quad A. I don't know what size stone you're looking for but you should be able to get a beautiful 5+ ct with diamonds for under $3,000. Maybe less. You want that deep purple bluish color with red flashes in the stone. No, I ’ve never bought anything from the website you mentioned. You want to deal with a website, shopping channel or jeweler that's been in business for a long time and has great reviews.