With antique rail detail, these genuine natural gold nuggets seem to jump right off the 14k white gold. Measuring approximately 6mm wide, it is a eye-catcher! Less than 1% of the gold in the world is in the form of natural nuggets-nuggets that still remain represent a limited and diminishing resource, as most of them have either been mined or melted down. Nuggets are formed as a consequence of the concentration of gold by free flowing water. Every nugget is unique and aids in the creation of a beautiful and memorable piece of jewelry.