What is the reason why the color of crystal changes to blue and yellow?

What is the reason why the color of crystal changes to blue and yellow?
This video is protected by copyright!
Such a perfect treasure area, endless diamonds to dig out
We sincerely invite you to become a channel diamond member
/ @diamondhunterhou
You'll get member-exclusive videos and faster Q&A
The stones featured in the video have not been authenticated and its value cannot be determined.
Some clips in the video may conflict with reality, please watch carefully

[@user-jp4dc8yf6g]

Crystal kya ret keret ki bataiye

[@lauralowrance7577]

What are the name of the stones?

[@SunilSunil-iq6dz]

beatiful stone❤️❤️❤️

[@rosaluar1]

caraca, já sai da terra lapidado......

[@user-br9lt2hx3m]

Beautifully crystal

[@ILHAMNRJ77]

ruclips.net/user/shortsTfHhU48smmc?si=QoZbvZHsT1LvgSoa