IMAGINE:
You want to buy your best friend a birthstone for his/her birthday.
Which birthstone do you choose?
What are some of its properties?
Resources:
http://www.galleries.com/birthstones
http://wayback.archive-it.org/3635/20130719112157/http://library.thinkquest.org/5810/birthstones.htm#
http://www.americangemsociety.org/birthstones.htm