You can't be without a pair of these!  They are classic, chic and just can be worn with everything.  The Stone is approx. 10mm in diameter and the overall drop is approx. 20mm.  They also come in Blue Topaz Vermeil and Blue Topaz in Silver.

Metal:  Sterling Silver plated with 14ct Gold

Semi Precious Stones: Smoky Quartz 10mm

Overall Drop: Approx 20 mm 

Fastening: Post and Butterfly