LOL... and I was thinking that sending them to test will sort all questions:)
This are my first color changing stones I ever had in my hands. For checking color change ability of those sapphires I did use 4 types of lights day light, LED white , yellow ( classic light bulb)and fluorescent one. Every time colour was changing from dark bluish green to dark purple/red.
All of that is making me feel that I just start scratching a surface of knowledge.
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