Toxic Chemicals in Fireworks: Might Want to Hold Your Breath
Jewelry made from precious metals is often stamped with a mark to indicate the chemical composition of the metal.
A quality mark contains information about metal content that appears on an article. It is usually stamped or inscribed on the piece. There is considerable confusion about the meaning of quality marks that are seen on jewelry and other items. Here is some information that will demystify terms such as "plated," "filled," "sterling," and others.
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