What does H 825 and CZ mean if on necklace charm?

The markings "H 825" and "CZ" on a necklace charm typically indicate the materials used in the piece. "H" could refer to a specific designer or brand, while "825" signifies that the charm is made of 82.5% silver, which is commonly known as sterling silver. "CZ" stands for cubic zirconia, a synthetic gemstone often used as a diamond alternative. Together, these markings suggest the charm is a silver piece adorned with cubic zirconia accents.