december is the month of peace and tranquility, and what better way to close out the year than with a birthstone charm? our serendipity charms summons the soothing nature of turquoise. turquoise is said to promote inner peace, emotional balance, and spiritual grounding. add it to your favorite necklaces and bracelets to embrace the serenity of the season. this charm fits over most necklaces and the internal diameter is approximately 2.8 x 2.2 mm.