At the beginning of the episode when Frankie is first examining Anna's "ring of Rasputin", it holds a faceted red gemstone, presumably a Ruby. Later on after the ring has been stolen and recovered, the setting is the same, but the gemstone is now either black or a deep Sapphire blue.
Anastasia's facial structure was unlike the actress portraying her, and the Tsarina's hair was thicker and not dark.