So upon seeing the post and your comments (thank you!) my dad memory was jolted into recognition – yay! The middle stone represents my grandparents as they have the same birth month, and the four stones to each side symbolize their children. The pink stone is actually rose zircon for my dads birthday in October. 🙂
Next to find out, is as the ring came to me in a Birks box if it is actually from there.