YES, these are all copy righted and she got permission from Cassandra who says,
"A jewelry designer contacted me a short while ago about doing a limited edition run of rings, necklaces and wrist cuffs based on the Mortal Instruments, so I gave her the go ahead and she opened an Etsy shop"
http://www.etsy.com/shop.php?user_id=8185594
*** Some of the proceeds from the sale are going to the charity Reading is Fundamental***