Diamond Necklaces

What kind of necklace can i get my sister for a going away present?

My twin sister and I are always together. She is now planning to go off to a different college than I am. I planned on getting her a necklace for a going away present, but im not sure what kind of necklace.
I don't want like real diamonds or anything expensive. I just want something that reminds her of our bond and to let her know i will always be here. Any cute ideas?
 
Pearl Necklaces
     

What type of necklace would look good with a black dress?

The dress is black and has one inch straps. The dress is sort of low cut and goes to about the knees. The top half is cotton and at the waist it turns to lace. Please, give me details on what color, length, and style of the necklace. Links are appreciated
 
Kids Necklaces

What type of pearl necklace should I buy?

I have decided that I want to purchase a nice pearl necklace that will be passed down for generation. I don't know much about good brands or what type of pearl I should look for. Can anyone make any suggestions?