Berserker is word we inherited from old Vikings... "berserk/berserker – berserkr, lit. ‘bear-shirt’. A berserkr was a Viking warrior who would enter battle in a crazed frenzy, wearing nothing for armor but an animal skin."
Brutal, fearless, ferocious, Berserker is a Bold and Large focal element that can be used not just as pendant but also comes with a penannular copper brooch of simple design that  could set it on clothing like a kilt or on the chest for cosplay and it will be secured with no need to wear as pendant ( Here, how to use a penannular Celtic brooch: https://www.youtube.com/shorts/iAcq_aXHILE?feature=share) 
With a solid thick copper frame, a natural skull super sanitized -I'm a bit of a freak for that with some wax shading to add an aged look because it was too white after the tons of pure bleach, ehem- blue silk sari, a quartz, a polymer translucent element with words and a titanium golden spike set in copper as "memories" or part of the loot that seemed to interest to our barbarian, and elements meaningful to you too that you can add as dangles if it will be for your personal wear, Berserker is almost too wild, too crazy.
One of a kind, (I might work with other natural skulls but never the same design) It could work great with textiles, bones, beads, leather and anything wild. 
It measures No counting the feathers length nor the penannular brooch, just top to bottom and side to side: 4 inches x 3 1/2 inches approx.