Is there a crystal that changes colors through the day?

Question

I have received from my mom a ring with a crystal stone that changes color through the day - from a deep purple, to blue, to an aquagreen. She was told it was an amythist - my birthstone. I lost the ring in a boomerang game. I really would like to have one again. The amythist crystals I see doesn't change color like that one.

Answer 1

I don't think any natural crystal changes throughout the day. There are manmade ones that do, and it has to do with temperature. Also, some natural crystals have different colors or tones, depending on the direction you look through them, if you are using polarized light. This is called "pleochroism".