Welcome DdwightSchrute,
Just be careful which online sellers you go to i.e. in my opinion and others it would be very foolish to buy Tahitian pearls from China. Really goes without saying but better be safe.
Others will tell you that eBay is dangerous to buy from and it can be but I am an eBay seller and consider myself very honest. I don't have a lot of Tahitian or experience with them. Just the ones I can buy for a reasonable price.
There are many online shops you can trust and if you check us out here and go into shops and do a lot of research you will start to get the feeling and be able to spot those you can trust. Don't rush in. Look around.
There are several Tahitian dedicated sellers here that list on this forum. Look up Tahitians and see who is helping and answering questions for those that need help from a pearl to a necklace.
Many jewellers know far, far less than we do about pearls, Tahitians included. They would sell you dyed black or peacock coloured freshwater pearls thinking they were Tahitians. If you go into a jeweller who does really know his stuff then you will have to pay the $450 a pearl instead of what is charged by sellers here. Many of the sellers here are the pearl farmers and big buyers of tahitians and they know a lot more than any jeweller in the shops you have visited.
Most of our newbies after a couple of months know more than many jewellers and their staff.
I am positive you will get many answers to your question and loads of help and advice. So keep reading and researching until they log in.
Dawn - Bodecia
http://stores.ebay.com/Dawns-Designer-Collections
Natural pearl collector and all round pearl lover