Old School Geekery Floating Locket Kit – Includes Glass Locket Keychain: Set of 12 (5mm Diameter) Gemstones Birthstone chart is not included, but can be found easily online. Dark Red:January Light Purple:February Lightest Blue:March Clear/Diamond:April Dark Green:May Light Pink:June Red:July Light Green:August Dark Blue:September Bright Pink:October Amber Orangeish Yellow: November Bright Blue:December LOCKET DETAILS, HOW TO BUILD USE THE KIT TO BUILD YOUR OWN LOCKET: Step 1: Open Locket, Magnetic Locket Opens on the side, can usually be done most easily by slipping a fingernail into the small slot on the side. Step 2: Insert your Desired Birthstones Step 4: Snap locket closed and ensure the magnetic seal is securely closed.