A couple of good necklace images we found:
Multi colored Agate, Smoky Quartz as well as Citrine necklace with flowering plant as well as teardrop pendant
Image by linsepatron
collana libellula steampunk – dragonfly steampunk necklace
Image by La Fè design: accessori e bijoux 
Copper Heart upon the Pearl Necklace
Image by knitsteel