Antique Victorian black jet mourning belt buckle clasp closure - unused very old retailer black glass 1800's - mourning belt buckle - extremely rare

This is an extremely rare 1800s antique Victorian black jet belt buckle in unused new old stock condition without any flaws. It is 5.5 cm tall X 6.5 cm wide retailer. The back is metal with 2, 4.5 cm bars and a hook and bar closure. I found this among other curious items, at an unusual shop in the late 1990s. I will ship it wrapped in bubble wrap, inside a small box.