You are looking at a unique handmade sterling silver blue turquoise necklace. This necklace is completely hand soldered with a nice sterling silver look.   This blue turquoise stone is Kingman Turquoise from Arizona.   As you can see the turquoise stone is set into a nice bezel setting.  

Necklace Size:  Adjustable from 19" inches to 20" inches in length
Center Turquoise Stone Size:  15mm x 18mm  
Necklace Weight:  42.2 grams
Artist: Brent DeSantis