crystal for a gift to my teacher?

i want to get presents for all my favorite high school teachers since i just graduated. my humanities teacher was really cool and quirky and we all suspected she was a secret hippie. i want to get her a crystal because theyre beautiful, exotic, and have deeper meaning, which reminds me of her.

i dont want to get one whos meaning would be pushy, you know? like id rather not get her amethyst because its properties point more to spirituality. i dont want to push my beliefs on her or weird her out.

You could get her a citrine point. They're beautiful (some of them have incredible rainbows on the inside) and they never have to be cleansed because they dont hold on to negative energy.