This antique Victorian bar pin is made of French Jet or black glass riveted to a steel base.
The bar measures 1 5/8" long by 1/2" high. It is slightly domed so it would work well at a collar. The center row is pyramid-faceted square stones and the outer two rows have the same shape in small sizes. One end stone has two specks of copper goldstone (a little of another glass batch snuck in!).
The pin stem extends beyond the bar as was the style in the latter 19th century. The clasp is a simple C style. Condition is very fine.