What kind of stone is this?

[Alexman619]

Hi. I found this stone broken in pieces. Some pieces are missing.
It feels like plastic though. But it is glowing on the light. It has smooth surface.

 

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[Johncoho]

If it's a stone, it could be citrine.

 

[Argentium]

Your mention of plastic feel has me thinking amber - though one photo shows a flat plane that i would associate with a crystal ?

 

[Kray Gelder]

It looks like a man made costume jewelry stone called goldstone. Those are flecks of copper