Vintage Hematite Handcrafted Necklace

This necklaces was handcrafted by a great uncle in Poland. It’s a few decades old. I’m pretty sure the stone is hematite. I am not sure what kind of metal was used, but I’m guessing it’s sterling silver. Pendant size (approximate): 5 x 2 x 1.5cm Chain length: 72cm Total weight: 22.5g