This is the pretty lasso necklace by Tara Hirshberg called Wittch's Knot. One of the pieces by Tara which I adore, besides the Sunburst necklace (as seen worn in the image above), Isis ring and of course some more.
I find the lassos quite interesting and I must say I haven't seen anyone near me wearing a necklace like this. So this one has all of my attention.
The nice thing about this lasso necklace is that when you wear something with an open back, you can show off this piece from behind. Which gives you a nice detail in the back (look below). And in front!
Take a look at Tara's other Lasso necklaces. The two other lasso pieces which I adore are the Double Infinity lasso and Feather lasso.
Designer Tara wearing her Witch's Knot lasso
Other way of wearing the Witch's Knot lasso