An interesting symbol, featuring a double cross and the infinity symbol.
This symbol can be used to represent the Church Of Satan and is often referred to as 'The Devil's Cross'.
Unlike many, many other symbols, I can't find an alternative meaning or representation of this one - but would love to be told different :-)
Photos shown are of past pieces, most of which have gone to their new forever homes.
Exact colours and final appearances naturally vary from book to book.