What is mean by Gold Filled Jewelry and Gold Plated ?

What is the difference between Gold Filled Jewelry and Gold Plated

When choosing on a gold jewelry item, where are always many complex terms that develop.  The most familiar are Solid Gold, Gold Plated, and Gold Filled.  It is necessary to know the variations between Gold Filled ornaments and Gold Plated jewel when getting your choice.  Solid gold is, of course, an excellent production of ornaments.  Gold filled is one of the next generation and is an astonishing, quality option to solid gold.  Gold plating is the under level, and these items tend to tarnish and can often adapt the surface green.