Men's Bolo Tie Pendant- Wyoming State- Unsure of metal composition

Beautiful bolo tie pendant that was once a part of my stepfathers' collection. Not certain how old it is or what it is made out of ( it was speculated to be silver and obsidian as my stepdad liked the finer things in life...well at least the somewhat finer things...but I'm not certain so I offer no guarantee or certification in this regard). What I do offer is a fine piece of American Midwest jewelry/memoriabilia that'll please any ol' cow poke young or old! YOU WILL RECEIVE ONLY THE ACTUAL BOLO PENDANT. The other items in the picture are being sold seperately and were being used merely as props and to provide reference to size. Thanks.