Stackable rings are very popular. This blue sapphire and diamond rings can be added to your stackable rings collection. 

http://hood-river-jewelers.com/index.php?main_page=product_info&cPath=61_91&products_id=116

Alternating round blue sapphires and round diamonds make up this channel set ring. Channel set rings are very strong and excellent for everyday wear and an active lifestyle. Size 7w1727