No problem! x)
There are two ideas regarding this; Tamara could use her hair by braiding a small amount of it and made it into an earring OR she could make the earring herself by choosing the materials herself. The important thing is that the earring should symbolize 'TAKEN' and the people who see it should roughly be able to guess who is his/her spouse.
In my mind, the bachelors would first suggest the braided hair since it's simple and the most obvious choice since she is the only bluenette there (Rama would be the most enthusiastic about this lol x'D).