Check out this great item that I found online.
Set of Three: Stackable Sterling Silver Rings with Garnet ~ Size 8
Bezel set garnet glows in crimson red on a polished band of sterling silver. Two coordinating bands have an etched texture for chic contrast. Wear all three together, or stack them with other favorite rings from your jewelry collection. As her official birthstone, a garnet has a very special meaning for a woman born in January. 6mm x 5mm genuine oval cut garnet ~ 0.60 ct
"Set of Three Stackable Sterling Rings with Garnet ~ Size 8"