I could have sworn there was a thread like this on here somewhere... I just can't seem to find it. xD Well, maybe I'm thinking of another site... edikha...
Well, anyways... I have a June birthday. So, according to you it's a pearl, but some months have more than one birthstone. So, June also has moonstone and alexandrite as birthstones. Alexandrite has to be amongst the most impressive gemstones, in my opinion. Depending on the type of light that hits it, the color of the stone is different. So, it bends the wavelengths on the light spectrum--usually the significant difference is natural (sunlight)--is greenish--and artificial (incandescent)--is reddish--light sources. If I were to get something such as a pin that sported my birthstone, I'd take alexandrite over the other two without hesitation.
Heh, don't get me wrong... pearls are nice... They're just... Well, let's just say, that I enjoy finding fossilized mother of pearl on the shell fossils that I come across, and that's enough pearl for me to be happy. xP I do actually have a butterfly pin that is from a birthstone collection, but it is fake. Usually for those, they just take pink-colored glass (that's for the representation of my birthstone, I guess), and cut it into a decent brilliant cut and call it a "birthstone". xD