Color change stone

[Shiny Black Cat]

The stone is from an antique shop, 4ct, labeled as Tanzanite (?). the photos were taken in day and candle light. What do you think?

 

[Mrs_Strizzle]

My guess is synthetic Alexandrite.

 

[LD]

It’s most likely synthetic. Also why are you using candles? A good colour changing stone doesn’t need the help of a candle. It literally changes as the light changes.