This California Purple, is the exact color of my Canadian purples, Absolutely NO difference in color .under all different lighting conditions, It glows under a black light exactly matching Canadian pieces, I put it in oven at 550 degrees and left it for 45 min, this took hours to do, It had No effect on collor ..I put it on a pin, on my roof for 2 summers, Absolutely no effect on color . I hope this alerts people to a lot of misinformation about altered insulators, Yet I have seen colors revert back to original when left in the sun, This 133 Cal is perfect in every way yet I have to believe its been altered . Previous pic [id=307449423]