Stone Size: 14x10mm / .70 inches / 1.8cm each
Stone Material: Vintage Swarovski Crystals in Dark Colorado Topaz
Settings: Heavy cast Brass with your choice of plating (Gold plate is shown), offset loops to prevent the settings from flipping around and showing the back. 
Length: 16" (40.6cm) with a 2" extender chain for flexible sizing

 Want to know the difference between Swarovski crystals and regular crystals?  Here's a video about that on my YouTube channel:  

14x10mm necklace, octagon necklace, brown