Antique Victorian Pin Sterling Silver Stamped Hallmarked Brooch

Delicate victorian sterling  brooch. The filigree is in immaculate condition. In the center is a ruby red stone which actually I have no clue what it is. The stone is bezel set into the sterling silver. There is a hallmark on the back simply stamped Sterling. The pin clasp is tight and secure.

Condition is very good for its age.  This piece comes from my own private stash. My best guess on the age is circa 1900s to 1910s however it could be Edwardian - I am not an expert.

It measures 2 inches wide and 5/8 of an inch tall. It weighs 3.5 grams