The Birthstone collection is a collection that is divided into 2 sub categories, The “The Birthstone Collection” collection and the “Birthstone Beauties” collection.
"The Birthstone Collection" is a series of 36 dolls released in 2003, it represents a gemstone and a month of the year. I have 2 dolls from this collection Vasilisa, Barbie Birthstone October Opal and Katie, Barbie Birthstone April Diamond.
"Birthstone Beauties" is a series of 24 dolls released in 2007, it also represents a precious stone, they have a muse body and a "Steffie" head, they are blond, brown, brown and red. They are each accompanied by a small dog. I have 3 dolls from this collection, Lyuba, Barbie Birthstone Miss Garnet, Maria-Luisa, Barbie Birthstone Miss Peridot, Sydney, Barbie Birthstone Miss Aquamarine.