Antique Victorian Untested Turquoise and Diamond Horseshoe Stick Pin

VTG VICTORIAN horseshoe stick pin, silver tone metal with turquoise cabochon and clear stone accents.  Horseshoe motif set with turquoise cabochons and what appear to be old-cut clear stones. Stick pin style, standard length for the era.  Silver tone metal has age-appropriate patina. Gently used with minor wear consistent with its age. One missing stone noted.  Great estate or collection find. Origin unknown, likely late 19th to early 20th century based on construction and style.