Vintage Abalone Blister and Mabe Pearl Bar Brooch Pin 

Elongated oval abalone brooch that looks to have a encased pearl or something located in the center of it. Looks to be a brass pin holder, but am calling it gold tone as I really am not sure on that. Measures a little over 1-1/2 inches by 1/2 inch wide. Beautiful colors swirl through this and are very colorful with the old c clasp.