http://www.nadinejewelry.com/handmade-sterling-necklaces.html 

This IS A NATURAL GREY JASPER WITH BLACK STRIPES (not zebra jasper, but it is also called “picasso jasper” or “black water jasper”) gemstone necklace all wire wrapped in sterling silver. The gem beads measure approx 13 mm Width x 18mm in Length and they are approx 5 mm thick.

Total length of the necklace ( INCLUDING THE EXTENDER) = 25 inches (approx 63,5 cm) and it can be shortned to 22.5 inches (approx 57 cm).

If you prefer this necklace shorter, please email me and I can shorten it at no additional costs. I can oxidize the silver as well.

This necklace comes with a pair of matching earrings (French hooks). Total length = 1 3/4 inch (approx 4,5 cm).

 http://www.nadinejewelry.com/handmade-sterling-necklaces.html