There is a central terminal building on the Seattle-Tacoma International Airport. There are four concourses that is, from A to D in this building. There are also two satellite terminals that is north and south.

http://www.airport-technology.com/projects/seatac_tower/

The different satellite terminals are connected to the central terminal. There is a connection between the satellite terminals and the central terminal through the underground people mover system. There are different checkpoints that provide security for the entire airport. Once the passengers have been checked for security, they have access to the different gates.

http://www.airwise.com/airports/us/SEA/SEA_01.html

Unfortunately there is the presence of less than scrupulous individuals wherever you go. You may find that there are some shops in Seattle selling jewelry that is not what it is supposed to be.

Ask around before you purchase any jewelry that comes from a shop that looks less than kosher and if you can't find anyone who knows for sure whether or not the jewelry is real try to avoid that shop.

If you truly have to shop there you can ask the vendor if he/she has any certificates of authenticity for the items.

Ask if they have any recognized qualifications in jewelry making and if they belong to any governing body in the industry. If they are truly selling jewelry that isn't right they won't want you to buy it in case you get them into trouble.

If you get the brush off if might be better to leave it and go elsewhere.

http://www.piercemattie.com/jewelrypr/2007/03/how_to_spot_fake_diamond_jewel.html