mine is mother of pearl. same thing as pearl/moonstone
EDIT: you can only be born in ONE month. its impossable to have 2 birthstones
heres the birthstones:
Januray- garnet
Febuaray- Amethyst
March-aquamarine
April- Dimond
May-emerald
June- mother of pearl
July- Ruby
August- peridot
September- Sapphire
October- opal
November- Citrine
December- Topaz
for those who don't know what a birthstone is, its the stone represanting the month you were born. some people have the same, some people have differant than you.