Regulators are warning parents in California, and across the country, to get rid of any "Rudolph the Red-nosed Reindeer"-themed charm bracelets following test results that showed the pieces contained upwards of 90 percent cadmium - a toxic metal.

These are the latest pieces of children's jewelry to be singled out by the feds in a crackdown on Chinese imports. Concerns were raised earlier this year after an investigation by the Associated Press found multiple pieces of imported children's jewelry to have cadmium content at more than 10 percent of total product weight.

Because of its low cost and the ease with which it can be manipulated, cadmium remains a favorite of Chinese manufacturers. While regulated in painted toys, cadmium is not currently regulated in regards to children's jewelry, even though it has been shown to cause cancer.