Vintage costume jewellery ring

Vintage ring in great shape with minimal signs of wear. Costume jewellery. I do not know materials. I believe it is from the 80s, but it could be from the 90-00s as well. Sparkles beautifully in the sun. Was purchased by my grandmother for parties but she doesn't remember the decade. Diameter approximately 16mm. Message for bundle discount or meet up (Umeå or Obbola)