I can’t remember a movie I watched when I was young

This was a English movie I watched in the 90s, I remember there was a lady and she had a special necklace and she was bad. The movie was set in icy area I remember seeing icicles and she lived in a cave. You had to sit on.boat to get to this cave. That’s all I remember is anyone able to help me I would love to know the name of this movie

Thank you

Maybe it’s one of these: Sort by Popularity - Most Popular Movies and TV Shows tagged with keyword "cavegirl" - IMDb

Or maybe this: The Clan of the Cave Bear (1986) - IMDb