Silver Heart Brooch with Red Gemstone

a heart-shaped pendant made of what appears to be tarnished silver. It has a central, bezel-set, oval-shaped cabochon stone, which is a deep red or purplish-red color. The stone could be a garnet or a similar gem. The pendant's surface is decorated with a variety of raised and textured elements, including what looks like small crescent moons and circular details. Based on the style and craftsmanship, it could be a piece of vintage or handmade jewelry, possibly with an artisan or Bohemian aesthetic. The tarnishing suggests it is likely silver, as other metals like stainless steel don't tarnish in this way. there are no silver marks but has been tested for silver. about 3 cm approx. high and wide might need some cleaning.