Goldtone tie tack / tie pin with clear "stone" center. I think the "stone" is likely plastic / glass / rhinestone.
Hickok USA Goldtone Tie Tack Pin Oval Shape Plain With Faceted Rim 5/8" Long
SAMPE 2001 Member Enamel Goldtone Tie Tack
SAMPE 40 Year Member Enamel Goldtone Tie Tack
Vintage POW MIA Goldtone Tie Tack Lapel Pin
Vintage Kaiser Permanente 1/10 10k GF Gold Filled Pin Tie Tack 5 Year Employee
Georgie State Tie Tack 5 year Service Gold Filled