Gold Pentagram Halloween Costume Jewelery Make sure you have your fangs or your broomstick handy, this pentagram gold necklace is going to make you look extra spooky! Enjoy some haunting this October 31st when you accessorise your Halloween outfit with this golden pentagram necklace by Dr. Tom's. Pentagram Necklace Description: Gold large pentagram medallion on a gold chain. Pentagram has etched in symbols and attached red faux jewels. Necklace medallion is approximately 8cm in circumference.