July's birthstone is the ruby, symbol of passion and ardent love, and the birthstone pendant adds joy and surprise to birthday celebrations. Birthstones are made of 925 sterling silver and 5A cubic zirconia. Hole diameter is about 4.6mm~5mm, suitable for most European and American charm bracelets. HOLIDAY GIFTS : A great gift for your girlfriend, family or close friends on Christmas, birthdays, Valentine's Day, anniversaries, Thanksgiving and other holidays. BEST SERVICE : You can have a 30 day unconditional Money Back and Replacement Guarantee.