I would like to know what the stone is called that is different colors depending on the light?

I had one set in a ring when I was 16 but it was stolen when my house got burglarized. If I was in daylight it was one color, then inside it was different, and I remember sometimes it was violet, sometimes grayish blue. I don't remember what it was called but I would love to get one like it again.

I would like to know what the stone is called that is different colors depending on the light?
I think any kind of gemstone. But the one your thinking of is the Mystic Fire Topaz Gemstones.
Reply:these stones are called gems and have are divided in major seven types but one you are referring seems to be Ruby, which is the Sun stone it has violet reflections in sunlight and when inside the room it gets into dark grayish.



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Reply:Mystic topaz
Reply:You are probably thinking of mystic fire topaz, but there is also opal and some australian crystal that fit your description too.
Reply:Identifying a stone based on color is the worst way to approach identification, I'm afraid. It could've very well been glass or some synthetic material. Maybe some type of Fluorite or Amethyst?