Any suggestions on how to turn quartz green when heated to about 315-450 F? Chromium-rich pyropes?

[Apatite916]

Hi everybody! 

I'm interested in changing the color of quartz to green when heated to about 315-450 degrees fahrenheit. Any suggestions would be most helpful! 

Thanks 

[StringJunky]

This article might get you on your way. It involves pre-irradiating with cobalt-60, it seems before heating. Probably have to send them away to be done with that first.

https://www.gemsociety.org/article/treating-quartz-color/ 

Edited January 15, 2018 by StringJunky

[Apatite916]

Thank you, I read the article and it was helpful. Do you know whether the quartz that's being heated will return back to its original state(clear) after being cooled? My idea is to create something that is made of quartz, and after being heated, I noticed it turns red(that being hot), but what I'd like to do is have it become green when at a cooler temperature, say around 350 degrees or so. 

Quartz(Clear when at room temperature) ----> Heated with a flame -----> Quartz becomes reddish(600-900 degrees) ----> after cooling for about 30 seconds to a minute (quartz is at about 315-450 degrees) (preferably greenish color) -----> after two minutes + (quartz returns back to its original state)(clear) 

Is this possible? 

[John Cuthber]

https://en.wikipedia.org/wiki/Thermochromism

might help

[Apatite916]

Thanks John! 

got any suggestions on how it can turn green and then return back to a clear state when back at room temperature? @John Cuthber @StringJunky