Stone Size: 12mm / .50 inches / 1.2cm each
Stone Material: Vintage Swarovski Crystal. Sparkling Clear Crystal.
Settings: Heavy cast Brass with your choice of plating (Antique Gold plate is shown)
Length: 16" (40.6cm) with a 2" extender chain for flexible sizing

Shown here with Citrine Yellow, also available in my shop: 

12mm necklace, round necklace, clear