By JUSTIN PRITCHARD

Associated Press

LOS ANGELES -- Barred from using lead in children's jewelry because of its toxicity, some Chinese manufacturers have been substituting the more dangerous heavy metal cadmium in sparkling charm bracelets and shiny pendants being sold throughout the United States, an Associated Press investigation shows.

The most contaminated piece analyzed in lab testing performed for the AP contained a startling 91 percent cadmium by weight. The cadmium content of other contaminated trinkets, all purchased at national and regional chains or franchises, tested at 89 percent, 86 percent and 84 percent by weight. The testing also showed that some items easily shed the heavy metal, raising additional concerns about the levels of exposure to children.

A spokesman for the U.S. Consumer Product Safety Commission, which regulates children's products, said Sunday that the agency "is opening an investigation" and "will take action as quickly as possible to protect the safety of children."

Cadmium is a known carcinogen. Like lead, it can hinder brain development in the very young, according to recent research.

Children don't have to swallow an item to be exposed -- they can get persistent, low-level doses by regularly sucking or biting jewelry with a high cadmium content.

To gauge cadmium's prevalence in children's jewelry, the AP organized lab testing of 103 items bought in New York, Ohio, Texas and California. All but one were purchased in November or December.

The results: 12 percent of the pieces of jewelry contained at least 10 percent cadmium.

Some of the most troubling test results were for bracelet charms sold at Walmart, at the jewelry chain Claire's and at a dollar store. High amounts of cadmium also were detected in "The Princess and The Frog" movie-themed pendants.

Since there are no cadmium restrictions on jewelry, such items are sold legally.