These look a lot like pendants from Stone Lighting's Kilo collection. The ones in this photo appear to have finials at the bottom, but the Kilo pendants do not. Other than that, they are very similar.

The original Kilo Pendant will look most like the one pictured here, but you can visit the product page and scroll down to "related items" to see the rest of the products in the family, as well.

http://lightology.com/index.php?module=prod_detail&prod_id=62445

Hope this helps!