Switch-It Gemsâ„¢ Family Circle Mothers Mom Locket pendant with 12 simulated Birthstones Included. The beautiful Switch-It Gemsâ„¢ Family Circle Mothers Mom Locket pendant with 12 simulated Birthstones Included, crafted in 925 Sterling Silver. This design measures 25.00 mm wide, 35.00 mm long. Free 18 inches chain included. 12 Round 5mm Simulated Birthstone Included. And buy this Switch-It Gems Family Circle Mom Locket Pendant with 12 Simulated Birthstones Now $79.99.