What a charming little brooch! This piece is a silver parasol or umbrella set with sparkling marcasites.
The pin is signed "800" and also has maker's marks "E" or "F" inverted "V" and "H", which we have not been able to identify. This piece is European in origin. It measures approximately 1-7/8"L and is in very good condition.
We have not cleaned or polished this pin so it retains a nice patina. It would be suitable for either a woman or a man to wear.