EMERALDS!!! 
I absolutely adore Emeralds!! In fact, my wedding ring has emeralds instead of diamonds. I wanted an emerald in my engagement ring too but was told "No!" because then people might not realize that it is was an engagement ring!
My birthstone is diamond (April) and I don't like diamonds!
My younger sister adores diamonds.....and her birthstone is emerald (May). We were definitely born in the wrong months!!
I know that Jade is not a "gemstone" but I like it too!
(can you tell that green is my favorite color?? ;-) ;-) )