Gold Square Tie Tack - Diamond

IBG Solid 14K Yellow Gold Diamond Pin/Tie Tack/Clip. 10mm x 10mm and it weighs 2.1 grams with out the separate back closure piece (which is not gold).

IBG Solid Modern Square 14K Yellow Gold Diamond Pin/Tie Tack/Clip - 2.1 Grams

14 Karat Yellow Gold Square Spinner Diamond Tie Tac – The Estate Watch And Jewelry Company®

Tiffany & Co. Beveled Square Tie Tack Pin — DeWitt's Diamond & Gold Exchange

Silver Beaded Tie Tack - Diamond

Jewelry at Historical Emporium

Red Rhinestone Vintage Tie Tack, 1950s Tie Pin

Mens Tie Ring Tie Clasp Necktie Clips Holder Bar Accessories for Necktie Gold Silver Tone (Gold Square Clear CZ) - Yahoo Shopping

HAWSON New Arrival Tie Tacks For Men--Trendy Square Crystal, 60% OFF

King Count Shiny Tie Clip Rhinestone Tie Clip Fashion Men's - Temu

Exquisitely crafted, the large, clear center stone (about ½” in diameter) appears to have been imported at quite some cost from the mines of an exotic

Gold Filigree Tie Tack - Diamond

1920 at Historical Emporium (Page 20)