Vintage, black, onyx stone, Gemini, zodiac loose stone

Vintage black onyx stone Gemini zodiac loose stone Large flat black onyx stone with gold embellished zodiac sign. 1/2" wide and 3/4" in height. as I bought these and other items from an ex jeweler that dealt in semi precious stones. This was in my Sister’s closet and she passed away November 19 . Thank you for looking..